ARM: uniphier: allow to use System Bus for ROM boot mode of PH1-LD20

The System Bus is not available by default on the ROM boot mode of
PH1-LD20.  To use devices connected to the System Bus, such as the
Micro Support Card, it is necessary to set up pin-muxing and some
System Bus Controller register.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/sbc/Makefile b/arch/arm/mach-uniphier/sbc/Makefile
index 3c1e92a..236f136 100644
--- a/arch/arm/mach-uniphier/sbc/Makefile
+++ b/arch/arm/mach-uniphier/sbc/Makefile
@@ -9,4 +9,4 @@
 obj-$(CONFIG_ARCH_UNIPHIER_PRO5)	+= sbc-savepin.o
 obj-$(CONFIG_ARCH_UNIPHIER_PXS2)	+= sbc-savepin.o sbc-pxs2.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD6B)	+= sbc-savepin.o sbc-pxs2.o
-obj-$(CONFIG_ARCH_UNIPHIER_LD20)	+= sbc-savepin.o
+obj-$(CONFIG_ARCH_UNIPHIER_LD20)	+= sbc-savepin.o sbc-pxs2.o