ARM: uniphier: split ft_board_setup() out to a separate file

Prepare to add more fdt fixup code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/Makefile b/arch/arm/mach-uniphier/Makefile
index 269c51b..d0c39d42 100644
--- a/arch/arm/mach-uniphier/Makefile
+++ b/arch/arm/mach-uniphier/Makefile
@@ -21,6 +21,7 @@
 obj-$(CONFIG_MICRO_SUPPORT_CARD) += sbc/ micro-support-card.o
 obj-y += pinctrl-glue.o
 obj-$(CONFIG_MMC) += mmc-first-dev.o
+obj-y += fdt-fixup.o
 
 endif