dt-bindings: marvell,mmp2: Add clock ids for the GPU clocks

MMP2 has a single GC860 core while MMP3 has a GC2000 and a GC300.
On both platforms there's an AXI bus interface clock that's common for
all GPUs and each GPU core has a separate clock.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lkml.kernel.org/r/20200309194254.29009-12-lkundrak@v3.skSigned-off-by: Stephen Boyd <sboyd@kernel.org>

include/dt-bindings/clock/marvell,mmp2.h

@@ -77,6 +77,11 @@
 #define MMP2_CLK_DISP0_LCDC		120
 #define MMP2_CLK_USBHSIC0		121
 #define MMP2_CLK_USBHSIC1		122
+#define MMP2_CLK_GPU_BUS		123
+#define MMP3_CLK_GPU_BUS		MMP2_CLK_GPU_BUS
+#define MMP2_CLK_GPU_3D			124
+#define MMP3_CLK_GPU_3D			MMP2_CLK_GPU_3D
+#define MMP3_CLK_GPU_2D			125
 
 #define MMP2_NR_CLKS			200
 #endif