dt-bindings: display/msm: gpu: Simplify conditional schema logic

JSON Schema conditionals can become complex and error-prone when combined
with regex patterns. To improve readability and maintainability, replace
nested if-else blocks with a flattened structure using explicit enums.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/696674/
Message-ID: <20251231-qcs615-spin-2-v6-2-da87debf6883@oss.qualcomm.com>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

Documentation/devicetree/bindings/display/msm/gpu.yaml

@@ -388,26 +388,42 @@ allOf:
       required:
         - clocks
         - clock-names
-    else:
-      if:
-        properties:
-          compatible:
-            contains:
-              oneOf:
-                - pattern: '^qcom,adreno-[67][0-9][0-9]\.[0-9]+$'
-                - pattern: '^qcom,adreno-[0-9a-f]{8}$'
 
-      then: # Starting with A6xx, the clocks are usually defined in the GMU node
-        properties:
-          clocks: false
-          clock-names: false
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,adreno-615.0
+              - qcom,adreno-618.0
+              - qcom,adreno-619.0
+              - qcom,adreno-621.0
+              - qcom,adreno-623.0
+              - qcom,adreno-630.2
+              - qcom,adreno-635.0
+              - qcom,adreno-640.1
+              - qcom,adreno-650.2
+              - qcom,adreno-660.1
+              - qcom,adreno-663.0
+              - qcom,adreno-680.1
+              - qcom,adreno-690.0
+              - qcom,adreno-730.1
+              - qcom,adreno-43030c00
+              - qcom,adreno-43050a01
+              - qcom,adreno-43050c01
+              - qcom,adreno-43051401
 
-          reg-names:
-            minItems: 1
-            items:
-              - const: kgsl_3d0_reg_memory
-              - const: cx_mem
-              - const: cx_dbgc
+    then: # Starting with A6xx, the clocks are usually defined in the GMU node
+      properties:
+        clocks: false
+        clock-names: false
+
+        reg-names:
+          minItems: 1
+          items:
+            - const: kgsl_3d0_reg_memory
+            - const: cx_mem
+            - const: cx_dbgc
 
 examples:
   - |