dt-bindings: net: rockchip-dwmac: Add compatible string for RK3528

Rockchip RK3528 has two Ethernet controllers based on Synopsys DWC
Ethernet QoS IP.

Add compatible string for the RK3528 variant.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20250319214415.3086027-2-jonas@kwiboo.se
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/rockchip-dwmac.yaml

@@ -24,6 +24,7 @@ select:
           - rockchip,rk3366-gmac
           - rockchip,rk3368-gmac
           - rockchip,rk3399-gmac
+          - rockchip,rk3528-gmac
           - rockchip,rk3568-gmac
           - rockchip,rk3576-gmac
           - rockchip,rk3588-gmac
@@ -49,6 +50,7 @@ properties:
               - rockchip,rv1108-gmac
       - items:
           - enum:
+              - rockchip,rk3528-gmac
               - rockchip,rk3568-gmac
               - rockchip,rk3576-gmac
               - rockchip,rk3588-gmac
@@ -66,7 +68,7 @@ properties:
       - const: eth_wake_irq
 
   clocks:
-    minItems: 5
+    minItems: 4
     maxItems: 8
 
   clock-names:
@@ -140,6 +142,18 @@ allOf:
       properties:
         rockchip,php-grf: false
 
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - rockchip,rk3528-gmac
+    then:
+      properties:
+        clocks:
+          minItems: 5
+
 unevaluatedProperties: false
 
 examples: