ARM: dts: qcom: msm8226: Add ocmem

Add a node for the ocmem found on msm8226. It contains one region, used
as gmu_ram.
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20230506-msm8226-ocmem-v3-6-79da95a2581f@z3ntu.xyzSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm/boot/dts/qcom/qcom-msm8226.dtsi

@@ -784,6 +784,23 @@ smd-edge {
 			};
 		};
 
+		sram@fdd00000 {
+			compatible = "qcom,msm8226-ocmem";
+			reg = <0xfdd00000 0x2000>,
+			      <0xfec00000 0x20000>;
+			reg-names = "ctrl", "mem";
+			ranges = <0 0xfec00000 0x20000>;
+			clocks = <&rpmcc RPM_SMD_OCMEMGX_CLK>;
+			clock-names = "core";
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			gmu_sram: gmu-sram@0 {
+				reg = <0x0 0x20000>;
+			};
+		};
+
 		sram@fe805000 {
 			compatible = "qcom,msm8226-imem", "syscon", "simple-mfd";
 			reg = <0xfe805000 0x1000>;