ARM: sunxi: Select RESET_CONTROLLER

The current code selects ARCH_HAS_RESET_CONTROLLER, that enables the
RESET_CONTROLLER option by default, but doesn't select it, so a configuration
might unselect it, leading to compilation error.

Explictly select RESET_CONTROLLER so that we can't have this breakage anymore.

Reported-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index e3457b9..8dea30f 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -11,5 +11,6 @@
 	select HAVE_SMP
 	select PINCTRL
 	select PINCTRL_SUNXI
+	select RESET_CONTROLLER
 	select SPARSE_IRQ
 	select SUN4I_TIMER