gpio: samsung: remove inclusion <mach/regs-clock.h>

The <mach/regs-clock.h> is not needed for gpio-samsung.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-samsung.c

@@ -32,7 +32,6 @@
 
 #include <mach/hardware.h>
 #include <mach/map.h>
-#include <mach/regs-clock.h>
 #include <mach/regs-gpio.h>
 
 #include <plat/cpu.h>