clk: rockchip: rename rga clock-id on rk3399

The rga clock supplying the working clock on the rk3399 is actually
called rga-core in the manual. As the clock id has neither been
assigned nor released with a full kernel release, we can still change
the id to the more appropriate naming.
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

include/dt-bindings/clock/rk3399-cru.h

@@ -72,7 +72,7 @@
 #define SCLK_MACREF_OUT			106
 #define SCLK_VOP0_PWM			107
 #define SCLK_VOP1_PWM			108
-#define SCLK_RGA			109
+#define SCLK_RGA_CORE			109
 #define SCLK_ISP0			110
 #define SCLK_ISP1			111
 #define SCLK_HDMI_CEC			112