dt-bindings: phy: qcom: snps-eusb2: Document the X1E80100 compatible

Add the X1E80100 compatible to the list of supported PHYs.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>

Documentation/devicetree/bindings/phy/qcom,snps-eusb2-phy.yaml

@@ -21,6 +21,7 @@ properties:
               - qcom,sm8650-snps-eusb2-phy
           - const: qcom,sm8550-snps-eusb2-phy
       - const: qcom,sm8550-snps-eusb2-phy
+      - const: qcom,x1e80100-snps-eusb2-phy
 
   reg:
     maxItems: 1