dt-bindings: phy: samsung,ufs-phy: match clock items

Below error is detected from dtbs_check. exynos7-ufs-phy is required
symbol clocks otherwise only PLL ref clock is required.

clock-names: ['ref_clk'] is too short
Reported-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Suggested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Suggested-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220725000249.30509-1-chanho61.park@samsung.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/samsung,ufs-phy.yaml

@@ -27,18 +27,12 @@ properties:
       - const: phy-pma
 
   clocks:
-    items:
-      - description: PLL reference clock
-      - description: symbol clock for input symbol ( rx0-ch0 symbol clock)
-      - description: symbol clock for input symbol ( rx1-ch1 symbol clock)
-      - description: symbol clock for output symbol ( tx0 symbol clock)
+    minItems: 1
+    maxItems: 4
 
   clock-names:
-    items:
-      - const: ref_clk
-      - const: rx1_symbol_clk
-      - const: rx0_symbol_clk
-      - const: tx0_symbol_clk
+    minItems: 1
+    maxItems: 4
 
   samsung,pmu-syscon:
     $ref: '/schemas/types.yaml#/definitions/phandle-array'
@@ -62,6 +56,39 @@ required:
   - clock-names
   - samsung,pmu-syscon
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos7-ufs-phy
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: PLL reference clock
+            - description: symbol clock for input symbol (rx0-ch0 symbol clock)
+            - description: symbol clock for input symbol (rx1-ch1 symbol clock)
+            - description: symbol clock for output symbol (tx0 symbol clock)
+
+        clock-names:
+          items:
+            - const: ref_clk
+            - const: rx1_symbol_clk
+            - const: rx0_symbol_clk
+            - const: tx0_symbol_clk
+
+    else:
+      properties:
+        clocks:
+          items:
+            - description: PLL reference clock
+
+        clock-names:
+          items:
+            - const: ref_clk
+
 additionalProperties: false
 
 examples: