dt-bindings: net: dwmac: increase 'maxItems' for 'clocks', 'clock-names' properties

This change is needed for some soc based on snps,dwmac, which have
more than 3 clocks.
Signed-off-by: Christophe Roullier <christophe.roullier@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

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

@@ -27,6 +27,7 @@ select:
           - snps,dwmac-3.710
           - snps,dwmac-4.00
           - snps,dwmac-4.10a
+          - snps,dwmac-4.20a
           - snps,dwxgmac
           - snps,dwxgmac-2.10
 
@@ -62,6 +63,7 @@ properties:
         - snps,dwmac-3.710
         - snps,dwmac-4.00
         - snps,dwmac-4.10a
+        - snps,dwmac-4.20a
         - snps,dwxgmac
         - snps,dwxgmac-2.10
 
@@ -87,7 +89,8 @@ properties:
 
   clocks:
     minItems: 1
-    maxItems: 3
+    maxItems: 5
+    additionalItems: true
     items:
       - description: GMAC main clock
       - description: Peripheral registers interface clock
@@ -97,6 +100,8 @@ properties:
           clock will be used and this is fine on some platforms.
 
   clock-names:
+    minItems: 1
+    maxItems: 5
     additionalItems: true
     contains:
       enum:
@@ -342,6 +347,7 @@ allOf:
               - allwinner,sun50i-a64-emac
               - snps,dwmac-4.00
               - snps,dwmac-4.10a
+              - snps,dwmac-4.20a
               - snps,dwxgmac
               - snps,dwxgmac-2.10
               - st,spear600-gmac