ARM: gemini: tag the arch as having reset controller

This arch has a reset controller so make this selectable.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-gemini/Kconfig

 menuconfig ARCH_GEMINI
 	bool "Cortina Systems Gemini"
 	depends on ARCH_MULTI_V4
+	select ARCH_HAS_RESET_CONTROLLER
 	select ARM_APPENDED_DTB # Old Redboot bootloaders deployed
 	select FARADAY_FTINTC010
 	select FTTMR010_TIMER