ARM: uniphier: refactor spl_init_board()

Merge init-*.c into a single file using a table of callbacks because
the initialization flow is almost common among SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/dram/Makefile b/arch/arm/mach-uniphier/dram/Makefile
index 5b9d892..2ce6199 100644
--- a/arch/arm/mach-uniphier/dram/Makefile
+++ b/arch/arm/mach-uniphier/dram/Makefile
@@ -4,12 +4,14 @@
 
 ifdef CONFIG_SPL_BUILD
 
+obj-$(CONFIG_ARCH_UNIPHIER_SLD3)	+= umc-sld3.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD4)		+= umc-ld4.o \
 					   ddrphy-training.o ddrphy-ld4.o
 obj-$(CONFIG_ARCH_UNIPHIER_PRO4)	+= umc-pro4.o \
 					   ddrphy-training.o ddrphy-ld4.o
 obj-$(CONFIG_ARCH_UNIPHIER_SLD8)	+= umc-sld8.o \
 					   ddrphy-training.o ddrphy-ld4.o
+obj-$(CONFIG_ARCH_UNIPHIER_PRO5)	+= umc-pro5.o
 obj-$(CONFIG_ARCH_UNIPHIER_PXS2)	+= umc-pxs2.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD6B)	+= umc-pxs2.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD11)	+= umc-ld11.o