ARM: S3C64XX: Merge mach-s3c6400 and mach-s3c6410

As per discussions with Russell King on linux-arm-kernel, it appears that
both mach-s3c6400 and mach-s3c6410 are so close together that they should
simply be merged into mach-s3c64xx.

Note, this patch does not eliminate any of the bits that are still common,
it is simply a move of the two directories together, any further common
code will be eliminated or moved in further patches.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3bc5169..685ff7e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -799,8 +799,7 @@
 endif
 
 if ARCH_S3C64XX
-source "arch/arm/mach-s3c6400/Kconfig"
-source "arch/arm/mach-s3c6410/Kconfig"
+source "arch/arm/mach-s3c64xx/Kconfig"
 endif
 
 source "arch/arm/mach-s5p6440/Kconfig"