dt-bindings: ufs: qcom: document SC7180 UFS

Document already upstreamed and used Qualcomm SC7180 UFS host controller
to fix dtbs_check warnings like:

sc7180-idp.dtb: ufshc@1d84000: compatible:0: 'qcom,sc7180-ufshc' is not one of ...
sc7180-idp.dtb: ufshc@1d84000: clocks: [[39, 99], [39, 7], [39, 98], [39, 107], [36, 0], [39, 106], [39, 105]] is too short
sc7180-idp.dtb: ufshc@1d84000: clock-names: ['core_clk', 'bus_aggr_clk', 'iface_clk', 'core_clk_unipro', ...] is too short

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/ufs/qcom,ufs.yaml

···
           - qcom,msm8996-ufshc
           - qcom,msm8998-ufshc
           - qcom,sa8775p-ufshc
+          - qcom,sc7180-ufshc
           - qcom,sc7280-ufshc
           - qcom,sc8180x-ufshc
           - qcom,sc8280xp-ufshc
···
       - const: jedec,ufs-2.0
 
   clocks:
-    minItems: 8
+    minItems: 7
     maxItems: 11
 
   clock-names:
-    minItems: 8
+    minItems: 7
     maxItems: 11
 
   dma-coherent: true
···
 
 allOf:
   - $ref: ufs-common.yaml
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sc7180-ufshc
+    then:
+      properties:
+        clocks:
+          minItems: 7
+          maxItems: 7
+        clock-names:
+          items:
+            - const: core_clk
+            - const: bus_aggr_clk
+            - const: iface_clk
+            - const: core_clk_unipro
+            - const: ref_clk
+            - const: tx_lane0_sync_clk
+            - const: rx_lane0_sync_clk
+        reg:
+          maxItems: 1
+        reg-names:
+          maxItems: 1
 
   - if:
       properties:
···
         reg:
           maxItems: 1
         clocks:
-          minItems: 8
+          minItems: 7
           maxItems: 8
     else:
       properties:
···
           minItems: 1
           maxItems: 2
         clocks:
-          minItems: 8
+          minItems: 7
           maxItems: 11
 
 unevaluatedProperties: false