dt-bindings: ufs: qcom: Add reg-names property for ICE

The code in ufs-qcom-ice.c needs the ICE reg to be named "ice". Add this
in the bindings so the existing dts can validate successfully.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230814-dt-binding-ufs-v6-1-fd94845adeda@fairphone.com
Signed-off-by: Rob Herring <robh@kernel.org>

Author: lweiss-fairphone

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

@@ -79,6 +79,11 @@ properties:
     minItems: 1
     maxItems: 2
 
+  reg-names:
+    items:
+      - const: std
+      - const: ice
+
   required-opps:
     maxItems: 1
 
@@ -134,6 +139,8 @@ allOf:
         reg:
           minItems: 1
           maxItems: 1
+        reg-names:
+          maxItems: 1
 
   - if:
       properties:
@@ -162,6 +169,10 @@ allOf:
         reg:
           minItems: 2
           maxItems: 2
+        reg-names:
+          minItems: 2
+      required:
+        - reg-names
 
   - if:
       properties:
@@ -190,6 +201,8 @@ allOf:
         reg:
           minItems: 1
           maxItems: 1
+        reg-names:
+          maxItems: 1
 
     # TODO: define clock bindings for qcom,msm8994-ufshc