dt-bindings: PCI: qcom: Allow 'required-opps'

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.org
Signed-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>

Author: jhovold

Documentation/devicetree/bindings/pci/qcom,pcie-common.yaml

@@ -59,6 +59,9 @@ properties:
   power-domains:
     maxItems: 1
 
+  required-opps:
+    maxItems: 1
+
   resets:
     minItems: 1
     maxItems: 12

Documentation/devicetree/bindings/pci/qcom,pcie.yaml

@@ -105,6 +105,9 @@ properties:
     description: GPIO controlled connection to PERST# signal
     maxItems: 1
 
+  required-opps:
+    maxItems: 1
+
   wake-gpios:
     description: GPIO controlled connection to WAKE# signal
     maxItems: 1