ARM: uniphier: allow to enable multiple SoCs

Before this commit, the Kconfig menu in mach-uniphier only allowed us
to choose one SoC to be compiled.  Each SoC has its own defconfig file
for the build-test coverage.  Consequently, some defconfig files are
duplicated with only the difference in CONFIG_DEFAULT_DEVICE_TREE and
CONFIG_{SOC_NAME}=y.

Now, most of board-specific parameters have been moved to device trees,
so it makes sense to include init code of multiple SoCs into a single
image as long as the SoCs have similar architecture.  In fact, some
SoCs of UniPhier family are very similar:
 - PH1-LD4 and PH1-sLD8
 - PH1-LD6b and ProXstream2 (will be added in the upcoming commit)

This commit will be helpful to merge some defconfig files for better
maintainability.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/Makefile b/arch/arm/mach-uniphier/Makefile
index 5c2ccbd..b597a13 100644
--- a/arch/arm/mach-uniphier/Makefile
+++ b/arch/arm/mach-uniphier/Makefile
@@ -6,9 +6,10 @@
 
 obj-y += lowlevel_init.o
 obj-y += init_page_table.o
-obj-y += spl.o
-obj-y += memconf.o
-obj-y += ddrphy_training.o
+obj-y += boards.o
+
+obj-y += init/ bcu/ memconf/ pll/ early-clk/ early-pinctrl/ umc/ ddrphy/
+obj-$(CONFIG_MICRO_SUPPORT_CARD) += sbc/
 
 obj-$(CONFIG_DEBUG_LL) += debug_ll.o
 
@@ -27,13 +28,12 @@
 obj-$(CONFIG_CMD_PINMON) += cmd_pinmon.o
 obj-$(CONFIG_CMD_DDRPHY_DUMP) += cmd_ddrphy.o
 
+obj-y += pinctrl/ clk/
+
 endif
 
 obj-y += timer.o
+obj-y += soc_info.o
+obj-y += boot-mode/
 
 obj-$(CONFIG_MICRO_SUPPORT_CARD) += micro-support-card.o
-
-obj-$(CONFIG_ARCH_UNIPHIER_PH1_SLD3)	+= ph1-sld3/
-obj-$(CONFIG_ARCH_UNIPHIER_PH1_LD4)	+= ph1-ld4/
-obj-$(CONFIG_ARCH_UNIPHIER_PH1_PRO4)	+= ph1-pro4/
-obj-$(CONFIG_ARCH_UNIPHIER_PH1_SLD8)	+= ph1-sld8/