arm64: dts: qcom: msm8996: Rename smmu nodes

Node names shouldn't include a vendor prefix and should whenever
possible use a generic identifier. Resolve this by renaming the smmu
nodes "iommu".
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8996.dtsi

@@ -1163,7 +1163,7 @@ dwc3@6a00000 {
 			};
 		};
 
-		vfe_smmu: arm,smmu@da0000 {
+		vfe_smmu: iommu@da0000 {
 			compatible = "qcom,msm8996-smmu-v2", "qcom,smmu-v2";
 			reg = <0xda0000 0x10000>;
 
@@ -1314,7 +1314,7 @@ ports {
 			};
 		};
 
-		adreno_smmu: arm,smmu@b40000 {
+		adreno_smmu: iommu@b40000 {
 			compatible = "qcom,msm8996-smmu-v2", "qcom,smmu-v2";
 			reg = <0xb40000 0x10000>;
 
@@ -1331,7 +1331,7 @@ adreno_smmu: arm,smmu@b40000 {
 			power-domains = <&mmcc GPU_GDSC>;
 		};
 
-		mdp_smmu: arm,smmu@d00000 {
+		mdp_smmu: iommu@d00000 {
 			compatible = "qcom,msm8996-smmu-v2", "qcom,smmu-v2";
 			reg = <0xd00000 0x10000>;
 
@@ -1347,7 +1347,7 @@ mdp_smmu: arm,smmu@d00000 {
 			power-domains = <&mmcc MDSS_GDSC>;
 		};
 
-		lpass_q6_smmu: arm,smmu-lpass_q6@1600000 {
+		lpass_q6_smmu: iommu@1600000 {
 			compatible = "qcom,msm8996-smmu-v2", "qcom,smmu-v2";
 			reg = <0x1600000 0x20000>;
 			#iommu-cells = <1>;