arm64: dts: mediatek: align operating-points table name with dtschema

Align the name of operating-points node to dtschema to fix warnings like:

  arch/arm64/boot/dts/mediatek/mt8173-elm.dt.yaml:
    opp_table0: $nodename:0: 'opp_table0' does not match '^opp-table(-[a-z0-9]+)?$'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20210820081616.83674-1-krzysztof.kozlowski@canonical.comSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt2712e.dtsi

@@ -19,7 +19,7 @@ / {
 	#address-cells = <2>;
 	#size-cells = <2>;
 
-	cluster0_opp: opp_table0 {
+	cluster0_opp: opp-table-0 {
 		compatible = "operating-points-v2";
 		opp-shared;
 		opp00 {
@@ -36,7 +36,7 @@ opp02 {
 		};
 	};
 
-	cluster1_opp: opp_table1 {
+	cluster1_opp: opp-table-1 {
 		compatible = "operating-points-v2";
 		opp-shared;
 		opp00 {

arch/arm64/boot/dts/mediatek/mt8173.dtsi

@@ -57,7 +57,7 @@ aliases {
 		serial3 = &uart3;
 	};
 
-	cluster0_opp: opp_table0 {
+	cluster0_opp: opp-table-0 {
 		compatible = "operating-points-v2";
 		opp-shared;
 		opp-507000000 {
@@ -94,7 +94,7 @@ opp-1703000000 {
 		};
 	};
 
-	cluster1_opp: opp_table1 {
+	cluster1_opp: opp-table-1 {
 		compatible = "operating-points-v2";
 		opp-shared;
 		opp-507000000 {

arch/arm64/boot/dts/mediatek/mt8183.dtsi

@@ -197,7 +197,7 @@ CLUSTER_SLEEP1: cluster-sleep-1 {
 		};
 	};
 
-	gpu_opp_table: opp_table0 {
+	gpu_opp_table: opp-table-0 {
 		compatible = "operating-points-v2";
 		opp-shared;