dt-bindings: gpu: mali-utgard: Add Rockchip RK3528 compatible

Rockchip RK3528 SoC has a Mali-450 MP2. Add a compatible for it.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20250518225418.682182-2-jonas@kwiboo.se

Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml

@@ -47,6 +47,7 @@ properties:
               - hisilicon,hi6220-mali
               - mediatek,mt7623-mali
               - rockchip,rk3328-mali
+              - rockchip,rk3528-mali
           - const: arm,mali-450
 
       # "arm,mali-300"
@@ -148,6 +149,7 @@ allOf:
               - rockchip,rk3188-mali
               - rockchip,rk3228-mali
               - rockchip,rk3328-mali
+              - rockchip,rk3528-mali
     then:
       required:
         - resets