Some Qualcomm SoCs require a minimum performance level for the power
domain so add 'required-opps' to the binding.

Link: https://lore.kernel.org/r/20240306095651.4551-2-johan+linaro@kernel.orgSigned-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>