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 <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230120072113.138656-1-krzysztof.kozlowski@linaro.org