arm64: dts: qcom: msm8916: Add unit name for /soc node

This fixes the following warning when building with W=1:
Warning (unit_address_vs_reg): /soc: node has a reg or ranges property,
but no unit name
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210921152120.6710-1-stephan@gerhold.net

arch/arm64/boot/dts/qcom/msm8916.dtsi

@@ -414,7 +414,7 @@ wcnss_smsm: wcnss@6 {
 		};
 	};
 
-	soc: soc {
+	soc: soc@0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0 0 0 0xffffffff>;