Makefile: move all Power Architecture boards into boards.cfg

Clean up Makefile, and drop a lot of the config.mk files on the way.

We now also automatically pick all boards that are listed in
boards.cfg (and with all configurations), so we can drop the redundant
entries from MAKEALL to avoid building these twice.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/xilinx/ppc405-generic/config.mk b/board/xilinx/ppc405-generic/config.mk
index 6d76755..4df1d9c 100644
--- a/board/xilinx/ppc405-generic/config.mk
+++ b/board/xilinx/ppc405-generic/config.mk
@@ -1,25 +1,4 @@
-#
-# (C) Copyright 2008
-# Ricardo Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es
-# Work supported by Qtechnology http://www.qtec.com
-#
-# See file CREDITS for list of people who contributed to this
-# project.
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
-# MA 02111-1307 USA
-#
-
-sinclude $(OBJTREE)/board/$(BOARDDIR)/config.tmp
+# need to strip off double quotes
+ifneq ($(CONFIG_SYS_LDSCRIPT),)
+LDSCRIPT := $(subst ",,$(CONFIG_SYS_LDSCRIPT))
+endif