[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>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 703a44f..0e97f5cc 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -120,7 +120,7 @@
  machine-$(CONFIG_ARCH_OMAP2)	   := omap2
     plat-$(CONFIG_ARCH_OMAP)	   := omap
  machine-$(CONFIG_ARCH_S3C2410)	   := s3c2410 s3c2400 s3c2412 s3c2440 s3c2442 s3c2443
-    plat-$(CONFIG_PLAT_S3C24XX)	   := s3c24xx
+    plat-$(CONFIG_PLAT_S3C24XX)	   := s3c24xx s3c
  machine-$(CONFIG_ARCH_LH7A40X)	   := lh7a40x
  machine-$(CONFIG_ARCH_VERSATILE)  := versatile
  machine-$(CONFIG_ARCH_IMX)	   := imx