ARM: EXYNOS4: Turn the mach-smdkc210.c into mach-smdv310.c

Since the components on SMDKC210 are similar with SMDKV310
even though its memory is different. So we can support the
SMDKC210 and SMDKV310 on mach-smdkv310.c, one machine file.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>