regulator: dt-bindings: qcom,rpmh: Combine PM6150L and PM8150L if-then

The supplies for PM6150L and PM8150L are the same, so they can be part
of one if-then block, for smaller code.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230418071734.5706-2-krzysztof.kozlowski@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>