ARM: S3C24XX: Move mach-s3c2440/ pll into mach-s3c24xx/

This patch moves mach-s3c2440/pll into mach-s3c24xx/
and removes arch/arm/mach-s3c2440/ directory in kernel.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 29e8fae..0935dac 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -173,7 +173,7 @@
 machine-$(CONFIG_ARCH_PXA)		+= pxa
 machine-$(CONFIG_ARCH_REALVIEW)		+= realview
 machine-$(CONFIG_ARCH_RPC)		+= rpc
-machine-$(CONFIG_ARCH_S3C24XX)		+= s3c24xx s3c2440
+machine-$(CONFIG_ARCH_S3C24XX)		+= s3c24xx
 machine-$(CONFIG_ARCH_S3C64XX)		+= s3c64xx
 machine-$(CONFIG_ARCH_S5P64X0)		+= s5p64x0
 machine-$(CONFIG_ARCH_S5PC100)		+= s5pc100