rockchip: rk3308: Move cru and grf include files to arch-rockchip

Move cru_rk3308.h and grf_rk3308.h to arch-rockchip to match path used
for all other Rockchip SoCs.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/rk3308/clk_rk3308.c b/arch/arm/mach-rockchip/rk3308/clk_rk3308.c
index ccda533..201bf66 100644
--- a/arch/arm/mach-rockchip/rk3308/clk_rk3308.c
+++ b/arch/arm/mach-rockchip/rk3308/clk_rk3308.c
@@ -7,7 +7,7 @@
 #include <dm.h>
 #include <syscon.h>
 #include <asm/arch-rockchip/clock.h>
-#include <asm/arch/cru_rk3308.h>
+#include <asm/arch-rockchip/cru_rk3308.h>
 #include <linux/err.h>
 
 int rockchip_get_clk(struct udevice **devp)