clk: rockchip: add binding ID for DMC (memory controller) clocks on rk3288

The DMC clocks need to be turned off at runtime, so we should have IDs
so we can export them.
Signed-off-by: NJeff Chen <cym@rock-chips.com>
[dianders: split into two patches; adjusted commit msg]
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>

include/dt-bindings/clock/rk3288-cru.h

@@ -141,6 +141,10 @@
 #define PCLK_VIO2_H2P		361
 #define PCLK_CPU		362
 #define PCLK_PERI		363
+#define PCLK_DDRUPCTL0		364
+#define PCLK_PUBL0		365
+#define PCLK_DDRUPCTL1		366
+#define PCLK_PUBL1		367
 
 /* hclk gates */
 #define HCLK_GPS		448