dts: qcom: msm8974: Add SCM firmware node

This patch adds the Qualcomm SCM firmware node.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>

arch/arm/boot/dts/qcom-msm8974.dtsi

@@ -260,6 +260,14 @@ wcnss_smsm: wcnss@7 {
 		};
 	};
 
+	firmware {
+		scm {
+			compatible = "qcom,scm";
+			clocks = <&gcc GCC_CE1_CLK>, <&gcc GCC_CE1_AXI_CLK>, <&gcc GCC_CE1_AHB_CLK>;
+			clock-names = "core", "bus", "iface";
+		};
+	};
+
 	soc: soc {
 		#address-cells = <1>;
 		#size-cells = <1>;