dt-bindings: PCI: intel,lgm-pcie: Add reference to common schemas

Add a reference to snps,dw-pcie.yaml (and indirectly pci-bus.yaml) schemas.
With this, the common bus properties can be dropped from the schema.

Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210719220351.2662758-1-robh@kernel.org

Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml

@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: PCIe RC controller on Intel Gateway SoCs
 
 maintainers:
-  - Dilip Kota <eswara.kota@linux.intel.com>
+  - Rahul Tanwar <rtanwar@maxlinear.com>
 
 select:
   properties:
@@ -17,21 +17,15 @@ select:
   required:
     - compatible
 
+allOf:
+  - $ref: /schemas/pci/snps,dw-pcie.yaml#
+
 properties:
   compatible:
     items:
       - const: intel,lgm-pcie
       - const: snps,dw-pcie
 
-  device_type:
-    const: pci
-
-  "#address-cells":
-    const: 3
-
-  "#size-cells":
-    const: 2
-
   reg:
     items:
       - description: Controller control and status registers.
@@ -62,30 +56,13 @@ properties:
   reset-gpios:
     maxItems: 1
 
-  linux,pci-domain: true
-
   num-lanes:
     maximum: 2
-    description: Number of lanes to use for this port.
-
-  '#interrupt-cells':
-    const: 1
-
-  interrupt-map-mask:
-    description: Standard PCI IRQ mapping properties.
-
-  interrupt-map:
-    description: Standard PCI IRQ mapping properties.
 
   max-link-speed:
-    description: Specify PCI Gen for link capability.
-    $ref: /schemas/types.yaml#/definitions/uint32
     enum: [1, 2, 3, 4]
     default: 1
 
-  bus-range:
-    description: Range of bus numbers associated with this controller.
-
   reset-assert-ms:
     description: |
       Delay after asserting reset to the PCIe device.
@@ -94,9 +71,6 @@ properties:
 
 required:
   - compatible
-  - device_type
-  - "#address-cells"
-  - "#size-cells"
   - reg
   - reg-names
   - ranges
@@ -109,7 +83,7 @@ required:
   - interrupt-map
   - interrupt-map-mask
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |