arm64: dts: qcom: msm8916: Drop underscore in node name

Using underscores in device tree nodes is not very common.
Additionally, the _region suffix in "smem_region@..." is not really
useful since it's obvious that it describes a reserved memory region.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210921152120.6710-2-stephan@gerhold.net

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

@@ -41,7 +41,7 @@ tz-apps@86000000 {
 			no-map;
 		};
 
-		smem_mem: smem_region@86300000 {
+		smem_mem: smem@86300000 {
 			reg = <0x0 0x86300000 0x0 0x100000>;
 			no-map;
 		};