dt-bindings: gpu: mali-bifrost: Add support for MediaTek MT8186

MT8186 has a Mali-G52 MC2 2EE GPU (two cores): add a binding with
two power domains (one per core) for it.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230316102041.210269-7-angelogioacchino.delregno@collabora.com

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

@@ -20,6 +20,7 @@ properties:
               - amlogic,meson-g12a-mali
               - mediatek,mt8183-mali
               - mediatek,mt8183b-mali
+              - mediatek,mt8186-mali
               - realtek,rtd1619-mali
               - renesas,r9a07g044-mali
               - renesas,r9a07g054-mali
@@ -196,6 +197,23 @@ allOf:
       required:
         - power-domains
         - power-domain-names
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8186-mali
+    then:
+      properties:
+        power-domains:
+          minItems: 2
+          maxItems: 2
+        power-domain-names:
+          items:
+            - const: core0
+            - const: core1
+      required:
+        - power-domains
+        - power-domain-names
   - if:
       properties:
         compatible: