ARM: socfpga: move SoC sources to mach-socfpga

Our recent trend is to collect SoC files into arch/arm/mach-(SOC).

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 8ff94a3..6f30098 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -53,6 +53,7 @@
 machine-$(CONFIG_ARCH_NOMADIK)		+= nomadik
 # TODO: rename CONFIG_ORION5X -> CONFIG_ARCH_ORION5X
 machine-$(CONFIG_ORION5X)		+= orion5x
+machine-$(CONFIG_ARCH_SOCFPGA)		+= socfpga
 machine-$(CONFIG_TEGRA)			+= tegra
 machine-$(CONFIG_ARCH_UNIPHIER)		+= uniphier
 machine-$(CONFIG_ARCH_VERSATILE)	+= versatile