rk3288: fix reg address for GRF_SOC_CON2

The GRF base address is missing, fix it.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/rk3288/rk3288.c b/arch/arm/mach-rockchip/rk3288/rk3288.c
index 92f34bb..acc3b79 100644
--- a/arch/arm/mach-rockchip/rk3288/rk3288.c
+++ b/arch/arm/mach-rockchip/rk3288/rk3288.c
@@ -6,7 +6,7 @@
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
 
-#define GRF_SOC_CON2 0x24c
+#define GRF_SOC_CON2 0xff77024c
 
 int arch_cpu_init(void)
 {