[ARM] S3C24XX: Move files out of include/asm-arm/plat-s3c*

First move of items out of include/asm-arm/plat-s3c* to their
new homes under arch/arm/plat-s3c/include/plat and
arch/arm/plat-s3c24xx/include/plat directories.

Note, we have to create a dummy arch/arm/plat-s3c/Makefile to
allow us to add arch/arm/plat-s3c/include/plat to the path.

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

arch/arm/mach-s3c2440/irq.c

@@ -34,9 +34,9 @@
 #include <mach/regs-irq.h>
 #include <mach/regs-gpio.h>
 
-#include <asm/plat-s3c24xx/cpu.h>
-#include <asm/plat-s3c24xx/pm.h>
-#include <asm/plat-s3c24xx/irq.h>
+#include <plat/cpu.h>
+#include <plat/pm.h>
+#include <plat/irq.h>
 
 /* WDT/AC97 */