arm64: dts: qcom: sm6350: Add GCC node

Add and configure GCC node to allow for referencing GCC-controlled clocks
in other nodes.
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210923162204.21752-5-konrad.dybcio@somainline.org

arch/arm64/boot/dts/qcom/sm6350.dtsi

@@ -3,6 +3,8 @@
  * Copyright (c) 2021, Konrad Dybcio <konrad.dybcio@somainline.org>
  */
 
+#include <dt-bindings/clock/qcom,gcc-sm6350.h>
+#include <dt-bindings/clock/qcom,rpmh.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/mailbox/qcom-ipcc.h>
@@ -357,6 +359,20 @@ soc: soc@0 {
 		dma-ranges = <0 0 0 0 0x10 0>;
 		compatible = "simple-bus";
 
+		gcc: clock-controller@100000 {
+			compatible = "qcom,gcc-sm6350";
+			reg = <0 0x00100000 0 0x1f0000>;
+			#clock-cells = <1>;
+			#reset-cells = <1>;
+			#power-domain-cells = <1>;
+			clock-names = "bi_tcxo",
+				      "bi_tcxo_ao",
+				      "sleep_clk";
+			clocks = <&rpmhcc RPMH_CXO_CLK>,
+				 <&rpmhcc RPMH_CXO_CLK_A>,
+				 <&sleep_clk>;
+		};
+
 		ipcc: mailbox@408000 {
 			compatible = "qcom,sm6350-ipcc", "qcom,ipcc";
 			reg = <0 0x00408000 0 0x1000>;