schemas: pci: Add standard PCIe slot supplies

Add regulator supply properties for the standard PCIe slot voltage rails
12V, 3.3V, and 3.3V AUX.

Signed-off-by: Rob Herring <[email protected]>

Author: robherring

dtschema/schemas/pci/pci-bus-common.yaml

@@ -150,6 +150,15 @@ properties:
     description: Disables ASPM L0s capability
     type: boolean
 
+  vpcie12v-supply:
+    description: 12v regulator phandle for the slot
+
+  vpcie3v3-supply:
+    description: 3.3v regulator phandle for the slot
+
+  vpcie3v3aux-supply:
+    description: 3.3v AUX regulator phandle for the slot
+
 patternProperties:
   "@1?[0-9a-f](,[0-7])?$":
     type: object