dt-bindings: clock: qcom, dispcc-sm6125: Require GCC PLL0 DIV clock

The "gcc_disp_gpll0_div_clk_src" clock is consumed by the driver, will
be passed from DT, and should be required by the bindings.

Fixes: 8397c9c0 ("dt-bindings: clock: add QCOM SM6125 display clock bindings")
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Patchwork: https://patchwork.freedesktop.org/patch/548966/
Link: https://lore.kernel.org/r/20230723-sm6125-dpu-v4-5-a3f287dd6c07@somainline.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Documentation/devicetree/bindings/clock/qcom,dispcc-sm6125.yaml

@@ -29,6 +29,7 @@ properties:
       - description: Link clock from DP PHY
       - description: VCO DIV clock from DP PHY
       - description: AHB config clock from GCC
+      - description: GPLL0 div source from GCC
 
   clock-names:
     items:
@@ -39,6 +40,7 @@ properties:
       - const: dp_phy_pll_link_clk
       - const: dp_phy_pll_vco_div_clk
       - const: cfg_ahb_clk
+      - const: gcc_disp_gpll0_div_clk_src
 
   '#clock-cells':
     const: 1
@@ -72,14 +74,16 @@ examples:
                <&dsi1_phy 1>,
                <&dp_phy 0>,
                <&dp_phy 1>,
-               <&gcc GCC_DISP_AHB_CLK>;
+               <&gcc GCC_DISP_AHB_CLK>,
+               <&gcc GCC_DISP_GPLL0_DIV_CLK_SRC>;
       clock-names = "bi_tcxo",
                     "dsi0_phy_pll_out_byteclk",
                     "dsi0_phy_pll_out_dsiclk",
                     "dsi1_phy_pll_out_dsiclk",
                     "dp_phy_pll_link_clk",
                     "dp_phy_pll_vco_div_clk",
-                    "cfg_ahb_clk";
+                    "cfg_ahb_clk",
+                    "gcc_disp_gpll0_div_clk_src";
       #clock-cells = <1>;
       #power-domain-cells = <1>;
     };