ARM: S3C64XX: Move headers into machine include directory

Move the register and GPIO definition files from plat-s3c64xx into the
machine include direcotry as they are unlikely to be reused outside
mach-s3c64xx.

This move includes removing the empty <mach/regs-clock.h> and replacing
it with the <plat/regs-clock.h> implementation.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s3c64xx/dev-spi.c b/arch/arm/plat-s3c64xx/dev-spi.c
index ca10388..0c20d27 100644
--- a/arch/arm/plat-s3c64xx/dev-spi.c
+++ b/arch/arm/plat-s3c64xx/dev-spi.c
@@ -16,11 +16,10 @@
 #include <mach/dma.h>
 #include <mach/map.h>
 #include <mach/gpio.h>
+#include <mach/gpio-bank-c.h>
 
 #include <plat/spi-clocks.h>
-
 #include <plat/s3c64xx-spi.h>
-#include <plat/gpio-bank-c.h>
 #include <plat/gpio-cfg.h>
 #include <plat/irqs.h>