ARM: dts: qcom: sdx55: Add SCM node

Add SCM node to enable SCM functionality on SDX55 platform.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210408170457.91409-8-manivannan.sadhasivam@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm/boot/dts/qcom-sdx55.dtsi

@@ -85,6 +85,12 @@ opp-1555200000 {
 		};
 	};
 
+	firmware {
+		scm {
+			compatible = "qcom,scm-sdx55", "qcom,scm";
+		};
+	};
+
 	psci {
 		compatible = "arm,psci-1.0";
 		method = "smc";