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/rk3368/Kconfig b/arch/arm/mach-rockchip/rk3368/Kconfig
index 78eb96d..104db36 100644
--- a/arch/arm/mach-rockchip/rk3368/Kconfig
+++ b/arch/arm/mach-rockchip/rk3368/Kconfig
@@ -45,6 +45,9 @@
 config ROCKCHIP_BOOT_MODE_REG
 	default 0xff738200
 
+config ROCKCHIP_STIMER_BASE
+	default 0xff830020
+
 config SYS_SOC
 	default "rk3368"