ARM: s5pc, exynos: move Samsung ARM SoC specific code under arch/arm/

This patch moves S5PC, EXYNOS specific directory entries
from the toplevel Makefile to arch/arm/cpu/armv7/Makefile
using Kbuild descending feature.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile
index a5d5bf3..d3347b3 100644
--- a/arch/arm/cpu/armv7/Makefile
+++ b/arch/arm/cpu/armv7/Makefile
@@ -25,3 +25,7 @@
 
 obj-$(CONFIG_OMAP_COMMON) += omap-common/
 obj-$(CONFIG_TEGRA) += tegra-common/
+
+ifneq (,$(filter s5pc1xx exynos,$(SOC)))
+obj-y += s5p-common/
+endif