[ARM] S3C: Move plat/regs-spi.h to arch/arm/plat-s3c/include/plat.

Move plat/regs-spi.h to arch/arm/plat-s3c/include/plat ready
ready to clean out old include directories.

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