dt-bindings: phy: Add eDP PHY compatible for sc7280

Add compatible string for the supported eDP PHY on sc7280 platform.
Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20220207161612.REPOST.v1.1.Iee1d505f0a35c2805f0468625b117d2e0f0ad339@changeidSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml

@@ -16,7 +16,9 @@ description:
 
 properties:
   compatible:
-    const: qcom,sc8180x-edp-phy
+    enum:
+      - qcom,sc7280-edp-phy
+      - qcom,sc8180x-edp-phy
 
   reg:
     items: