ARM: S3C64XX: Merge s3c6400-init.c into cpu.c

Since this file is small, and is compiled for both systems in this
architecture merge it into the cpu support file and remove the original
instead of moving it.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

diff --cc arch/arm/mach-s3c64xx/Kconfig
Simple merge

diff --cc arch/arm/mach-s3c64xx/cpu.c
Simple merge

diff --cc arch/arm/plat-s3c64xx/Kconfig
Simple merge

diff --cc arch/arm/plat-s3c64xx/Makefile
Simple merge

diff --cc arch/arm/plat-s3c64xx/s3c6400-init.c
Simple merge