ARM: S3C64XX: Use new clock-clksrc.c code for clocks.

Move the s3c6400-clock.c implementation over to use the new common
plat-samsung based clock-clksrc.c.

Note, this does not delete the clocks definitions that are now unused
in the regs-clock.h to reduce the quantity of change in this commit.

Based on original patches by Harald Welte.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

arch/arm/plat-s3c64xx/Kconfig

@@ -13,6 +13,7 @@ config PLAT_S3C64XX
 	select ARM_VIC
 	select NO_IOPORT
 	select ARCH_REQUIRE_GPIOLIB
+	select SAMSUNG_CLKSRC
 	select S3C_GPIO_TRACK
 	select S3C_GPIO_PULL_UPDOWN
 	select S3C_GPIO_CFG_S3C24XX