rockchip: move ROCKCHIP_STIMER_BASE to Kconfig

Move ROCKCHIP_STIMER_BASE to Kconfig.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index 308dc09..8119649 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -339,6 +339,16 @@
 	  The Soc will enter to different boot mode(defined in asm/arch-rockchip/boot_mode.h)
 	  according to the value from this register.
 
+config ROCKCHIP_STIMER
+	bool "Rockchip STIMER support"
+	default y
+	help
+	  Enable Rockchip STIMER support.
+
+config ROCKCHIP_STIMER_BASE
+	hex
+	depends on ROCKCHIP_STIMER
+
 config ROCKCHIP_SPL_RESERVE_IRAM
 	hex "Size of IRAM reserved in SPL"
 	default 0