regulator: dt-bindings: qcom,rpm: fix pattern for children

The "or" (|) in regular expression must be within parentheses,
otherwise it is not really an "or" and it matches supplies:

  qcom-apq8060-dragonboard.dtb: regulators-1: vdd_ncp-supply: [[34]] is not of type 'object'

Fixes: fde0e25b

 ("dt-bindings: regulators: convert non-smd RPM Regulators bindings to dt-schema")
Cc: stable@vger.kernel.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230725164047.368892-1-krzysztof.kozlowski@linaro.org


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