ARM: s3c64xx: Drop unneeded select of TIMER_OF

Support for Samsung S3C64XX systems depends on ARCH_MULTI_V6, and thus
on ARCH_MULTIPLATFORM.
As the latter selects TIMER_OF, there is no need for MACH_S3C64XX_DT to
select TIMER_OF.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/mach-s3c64xx/Kconfig

@@ -336,7 +336,6 @@ config MACH_WLF_CRAGG_6410
 
 config MACH_S3C64XX_DT
 	bool "Samsung S3C6400/S3C6410 machine using Device Tree"
-	select TIMER_OF
 	select CPU_S3C6400
 	select CPU_S3C6410
 	select PINCTRL