kconfig: re-sync with Linux 4.10

Re-sync all files under the scripts/kconfig directory with
Linux 4.10.

Some parts include U-Boot own modification.  I made sure to not
revert the following commits:

 5b8031ccb4ed ("Add more SPDX-License-Identifier tags")
 192bc6948b02 ("Fix GCC format-security errors and convert sprintfs.")
 da58dec86616 ("Various Makefiles: Add SPDX-License-Identifier tags")
 20c20826efab ("Kconfig: Enable usage of escape char '\' in string values")

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 14285b1..af23812 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -44,6 +44,8 @@
 
 silentoldconfig: $(obj)/conf
 	$(Q)mkdir -p include/config include/generated
+	$(Q)test -e include/generated/autoksyms.h || \
+	    touch   include/generated/autoksyms.h
 	$< $(silent) --$@ $(Kconfig)
 
 localyesconfig localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
@@ -95,7 +97,7 @@
 PHONY += oldnoconfig savedefconfig defconfig
 
 # oldnoconfig is an alias of olddefconfig, because people already are dependent
-# on its behavior(sets new symbols to their default value but not 'n') with the
+# on its behavior (sets new symbols to their default value but not 'n') with the
 # counter-intuitive name.
 oldnoconfig: olddefconfig
 
@@ -106,8 +108,13 @@
 ifeq ($(KBUILD_DEFCONFIG),)
 	$< $(silent) --defconfig $(Kconfig)
 else
+ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),)
 	@$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
 	$(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
+else
+	@$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
+	$(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
+endif
 endif
 
 %_defconfig: $(obj)/conf
@@ -128,6 +135,10 @@
 kvmconfig: kvm_guest.config
 	@:
 
+PHONY += xenconfig
+xenconfig: xen.config
+	@:
+
 PHONY += tinyconfig
 tinyconfig:
 	$(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config
@@ -135,10 +146,11 @@
 # Help text used by make help
 help:
 	@echo  '  config	  - Update current config utilising a line-oriented program'
-	@echo  '  nconfig         - Update current config utilising a ncurses menu based program'
+	@echo  '  nconfig         - Update current config utilising a ncurses menu based'
+	@echo  '                    program'
 	@echo  '  menuconfig	  - Update current config utilising a menu based program'
-	@echo  '  xconfig	  - Update current config utilising a QT based front-end'
-	@echo  '  gconfig	  - Update current config utilising a GTK based front-end'
+	@echo  '  xconfig	  - Update current config utilising a Qt based front-end'
+	@echo  '  gconfig	  - Update current config utilising a GTK+ based front-end'
 	@echo  '  oldconfig	  - Update current config utilising a provided .config as base'
 	@echo  '  localmodconfig  - Update current config disabling modules not loaded'
 	@echo  '  localyesconfig  - Update current config converting local mods to core'
@@ -151,8 +163,10 @@
 	@echo  '  alldefconfig    - New config with all symbols set to default'
 	@echo  '  randconfig	  - New config with random answer to all options'
 	@echo  '  listnewconfig   - List new options'
-	@echo  '  olddefconfig	  - Same as silentoldconfig but sets new symbols to their default value'
-#	@echo  '  kvmconfig	  - Enable additional options for guest kernel support'
+	@echo  '  olddefconfig	  - Same as silentoldconfig but sets new symbols to their'
+	@echo  '                    default value'
+#	@echo  '  kvmconfig	  - Enable additional options for kvm guest kernel support'
+#	@echo  '  xenconfig       - Enable additional options for xen dom0 and guest kernel support'
 #	@echo  '  tinyconfig	  - Configure the tiniest possible kernel'
 
 # lxdialog stuff
@@ -171,9 +185,9 @@
 # mconf:  Used for the menuconfig target
 #         Utilizes the lxdialog package
 # qconf:  Used for the xconfig target
-#         Based on QT which needs to be installed to compile it
+#         Based on Qt which needs to be installed to compile it
 # gconf:  Used for the gconfig target
-#         Based on GTK which needs to be installed to compile it
+#         Based on GTK+ which needs to be installed to compile it
 # object files used by all kconfig flavours
 
 lxdialog := lxdialog/checklist.o lxdialog/util.o lxdialog/inputbox.o
@@ -230,51 +244,23 @@
 $(obj)/.tmp_qtcheck: $(src)/Makefile
 -include $(obj)/.tmp_qtcheck
 
-# QT needs some extra effort...
+# Qt needs some extra effort...
 $(obj)/.tmp_qtcheck:
-	@set -e; $(kecho) "  CHECK   qt"; dir=""; pkg=""; \
-	if ! pkg-config --exists QtCore 2> /dev/null; then \
-	    echo "* Unable to find the QT4 tool qmake. Trying to use QT3"; \
-	    pkg-config --exists qt 2> /dev/null && pkg=qt; \
-	    pkg-config --exists qt-mt 2> /dev/null && pkg=qt-mt; \
-	    if [ -n "$$pkg" ]; then \
-	      cflags="\$$(shell pkg-config $$pkg --cflags)"; \
-	      libs="\$$(shell pkg-config $$pkg --libs)"; \
-	      moc="\$$(shell pkg-config $$pkg --variable=prefix)/bin/moc"; \
-	      dir="$$(pkg-config $$pkg --variable=prefix)"; \
-	    else \
-	      for d in $$QTDIR /usr/share/qt* /usr/lib/qt*; do \
-	        if [ -f $$d/include/qconfig.h ]; then dir=$$d; break; fi; \
-	      done; \
-	      if [ -z "$$dir" ]; then \
-	        echo >&2 "*"; \
-	        echo >&2 "* Unable to find any QT installation. Please make sure that"; \
-	        echo >&2 "* the QT4 or QT3 development package is correctly installed and"; \
-	        echo >&2 "* either qmake can be found or install pkg-config or set"; \
-	        echo >&2 "* the QTDIR environment variable to the correct location."; \
-	        echo >&2 "*"; \
-	        false; \
-	      fi; \
-	      libpath=$$dir/lib; lib=qt; osdir=""; \
-	      $(HOSTCXX) -print-multi-os-directory > /dev/null 2>&1 && \
-	        osdir=x$$($(HOSTCXX) -print-multi-os-directory); \
-	      test -d $$libpath/$$osdir && libpath=$$libpath/$$osdir; \
-	      test -f $$libpath/libqt-mt.so && lib=qt-mt; \
-	      cflags="-I$$dir/include"; \
-	      libs="-L$$libpath -Wl,-rpath,$$libpath -l$$lib"; \
-	      moc="$$dir/bin/moc"; \
-	    fi; \
-	    if [ ! -x $$dir/bin/moc -a -x /usr/bin/moc ]; then \
-	      echo "*"; \
-	      echo "* Unable to find $$dir/bin/moc, using /usr/bin/moc instead."; \
-	      echo "*"; \
-	      moc="/usr/bin/moc"; \
-	    fi; \
+	@set -e; $(kecho) "  CHECK   qt"; \
+	if pkg-config --exists Qt5Core; then \
+	    cflags="-std=c++11 -fPIC `pkg-config --cflags Qt5Core Qt5Gui Qt5Widgets`"; \
+	    libs=`pkg-config --libs Qt5Core Qt5Gui Qt5Widgets`; \
+	    moc=`pkg-config --variable=host_bins Qt5Core`/moc; \
+	elif pkg-config --exists QtCore; then \
+	    cflags=`pkg-config --cflags QtCore QtGui`; \
+	    libs=`pkg-config --libs QtCore QtGui`; \
+	    moc=`pkg-config --variable=moc_location QtCore`; \
 	else \
-	  cflags="\$$(shell pkg-config QtCore QtGui Qt3Support --cflags)"; \
-	  libs="\$$(shell pkg-config QtCore QtGui Qt3Support --libs)"; \
-	  moc="\$$(shell pkg-config QtCore --variable=moc_location)"; \
-	  [ -n "$$moc" ] || moc="\$$(shell pkg-config QtCore --variable=prefix)/bin/moc"; \
+	    echo >&2 "*"; \
+	    echo >&2 "* Could not find Qt via pkg-config."; \
+	    echo >&2 "* Please install either Qt 4.8 or 5.x. and make sure it's in PKG_CONFIG_PATH"; \
+	    echo >&2 "*"; \
+	    exit 1; \
 	fi; \
 	echo "KC_QT_CFLAGS=$$cflags" > $@; \
 	echo "KC_QT_LIBS=$$libs" >> $@; \
@@ -286,7 +272,7 @@
 ifeq ($(MAKECMDGOALS),gconfig)
 -include $(obj)/.tmp_gtkcheck
 
-# GTK needs some extra effort, too...
+# GTK+ needs some extra effort, too...
 $(obj)/.tmp_gtkcheck:
 	@if `pkg-config --exists gtk+-2.0 gmodule-2.0 libglade-2.0`; then		\
 		if `pkg-config --atleast-version=2.0.0 gtk+-2.0`; then			\
@@ -317,7 +303,7 @@
 $(obj)/%.moc: $(src)/%.h $(obj)/.tmp_qtcheck
 	$(call cmd,moc)
 
-# Extract gconf menu items for I18N support
+# Extract gconf menu items for i18n support
 $(obj)/gconf.glade.h: $(obj)/gconf.glade
 	$(Q)intltool-extract --type=gettext/glade --srcdir=$(srctree) \
 	$(obj)/gconf.glade