ARM: dts: qcom: align OPP table names with DT schema

DT schema expects names of operating points tables to match certain
pattern:

qcom-ipq4018-ap120c-ac.dtb: opp_table0: $nodename:0: 'opp_table0' does not match '^opp-table(-[a-z0-9]+)?$'

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Konrad Dybcio <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/qcom-ipq4019.dtsi

···
 		};
 	};
 
-	cpu0_opp_table: opp_table0 {
+	cpu0_opp_table: opp-table {
 		compatible = "operating-points-v2";
 		opp-shared;