scsi: ufs: qcom: dt-bindings: Add SM8550 compatible string

Document the compatible string for the UFS found on SM8550.
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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

@@ -33,6 +33,7 @@ properties:
           - qcom,sm8250-ufshc
           - qcom,sm8350-ufshc
           - qcom,sm8450-ufshc
+          - qcom,sm8550-ufshc
       - const: qcom,ufshc
       - const: jedec,ufs-2.0
 
@@ -105,6 +106,7 @@ allOf:
               - qcom,sm8250-ufshc
               - qcom,sm8350-ufshc
               - qcom,sm8450-ufshc
+              - qcom,sm8550-ufshc
     then:
       properties:
         clocks: