dt-bindings: PCI: mediatek-gen3: add SoC based clock config

The PCIe driver covers different SOC which needing different clock
configs. Define them based on compatible.

Link: https://lore.kernel.org/r/20221127114142.156573-4-linux@fw-web.de
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Jianjun Wang <jianjun.wang@mediatek.com>

Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml

@@ -43,9 +43,6 @@ description: |+
   each set has its own address for MSI message, and supports 32 MSI vectors
   to generate interrupt.
 
-allOf:
-  - $ref: /schemas/pci/pci-bus.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -90,15 +87,7 @@ properties:
     maxItems: 6
 
   clock-names:
-    items:
-      - const: pl_250m
-      - const: tl_26m
-      - const: tl_96m
-      - const: tl_32k
-      - const: peri_26m
-      - enum:
-          - top_133m        # for MT8192
-          - peri_mem        # for MT8188/MT8195
+    maxItems: 6
 
   assigned-clocks:
     maxItems: 1
@@ -147,6 +136,40 @@ required:
   - '#interrupt-cells'
   - interrupt-controller
 
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+  - if:
+      properties:
+        compatible:
+          const: mediatek,mt8192-pcie
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: pl_250m
+            - const: tl_26m
+            - const: tl_96m
+            - const: tl_32k
+            - const: peri_26m
+            - const: top_133m
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt8188-pcie
+              - mediatek,mt8195-pcie
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: pl_250m
+            - const: tl_26m
+            - const: tl_96m
+            - const: tl_32k
+            - const: peri_26m
+            - const: peri_mem
+
 unevaluatedProperties: false
 
 examples: