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

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

  cpu_opp_table: $nodename:0: 'cpu_opp_table' does not match '^opp-table(-[a-z0-9]+)?$'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi3660.dtsi

@@ -210,7 +210,7 @@
 		};
 	};
 
-	cluster0_opp: opp_table0 {
+	cluster0_opp: opp-table-0 {
 		compatible = "operating-points-v2";
 		opp-shared;
 
@@ -245,7 +245,7 @@
 		};
 	};
 
-	cluster1_opp: opp_table1 {
+	cluster1_opp: opp-table-1 {
 		compatible = "operating-points-v2";
 		opp-shared;
 

arch/arm64/boot/dts/hisilicon/hi6220.dtsi

@@ -193,7 +193,7 @@
 		};
 	};
 
-	cpu_opp_table: cpu_opp_table {
+	cpu_opp_table: opp-table-0 {
 		compatible = "operating-points-v2";
 		opp-shared;