rockchip: rk3328: add STIMER_BASE definition

Add the CONFIG_ROCKCHIP_STIMER_BASE so that we can use the stimer
init function in tpl.c and spl.c

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/include/configs/rk3328_common.h b/include/configs/rk3328_common.h
index 1cf45bb..6ed7525 100644
--- a/include/configs/rk3328_common.h
+++ b/include/configs/rk3328_common.h
@@ -10,6 +10,8 @@
 
 #define CONFIG_IRAM_BASE		0xff090000
 
+#define CONFIG_ROCKCHIP_STIMER_BASE    0xff1d0020
+
 #define CONFIG_SYS_MALLOC_LEN		(32 << 20)
 #define CONFIG_SYS_CBSIZE		1024
 #define CONFIG_SKIP_LOWLEVEL_INIT