dt-bindings: net: snps,dwmac: Add dwmac-5.20 version

Add dwmac-5.20 IP version to snps.dwmac.yaml
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Samin Guo <samin.guo@starfivetech.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Documentation/devicetree/bindings/net/snps,dwmac.yaml

@@ -30,6 +30,7 @@ select:
           - snps,dwmac-4.10a
           - snps,dwmac-4.20a
           - snps,dwmac-5.10a
+          - snps,dwmac-5.20
           - snps,dwxgmac
           - snps,dwxgmac-2.10
 
@@ -90,6 +91,7 @@ properties:
         - snps,dwmac-4.10a
         - snps,dwmac-4.20a
         - snps,dwmac-5.10a
+        - snps,dwmac-5.20
         - snps,dwxgmac
         - snps,dwxgmac-2.10
 
@@ -579,6 +581,7 @@ allOf:
               - snps,dwmac-3.50a
               - snps,dwmac-4.10a
               - snps,dwmac-4.20a
+              - snps,dwmac-5.20
               - snps,dwxgmac
               - snps,dwxgmac-2.10
               - st,spear600-gmac
@@ -636,6 +639,7 @@ allOf:
               - snps,dwmac-4.10a
               - snps,dwmac-4.20a
               - snps,dwmac-5.10a
+              - snps,dwmac-5.20
               - snps,dwxgmac
               - snps,dwxgmac-2.10
               - st,spear600-gmac