dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

Define a compatible string for the Mali Bifrost GPU found in
Mediatek's MT8183 SoCs.
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210421132841.v13.1.Ie74d3355761aab202d4825ac6f66d990bba0130e@changeid

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

@@ -17,6 +17,7 @@ properties:
     items:
       - enum:
           - amlogic,meson-g12a-mali
+          - mediatek,mt8183-mali
           - realtek,rtd1619-mali
           - rockchip,px30-mali
       - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable
@@ -41,10 +42,13 @@ properties:
 
   mali-supply: true
 
+  sram-supply: true
+
   operating-points-v2: true
 
   power-domains:
-    maxItems: 1
+    minItems: 1
+    maxItems: 3
 
   resets:
     maxItems: 2
@@ -89,6 +93,30 @@ allOf:
     then:
       required:
         - resets
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8183-mali
+    then:
+      properties:
+        power-domains:
+          minItems: 3
+        power-domain-names:
+          items:
+            - const: core0
+            - const: core1
+            - const: core2
+
+      required:
+        - sram-supply
+        - power-domains
+        - power-domain-names
+    else:
+      properties:
+        power-domains:
+          maxItems: 1
+        sram-supply: false
 
 examples:
   - |