dt-bindings: phy-qcom-qmp: Update bindings for sdm845

Update compatible strings for USB3 PHYs on SDM845.
One is QMPv3 DisplayPort-USB combo PHY and other one
is USB UNI PHY which is single lane USB3 PHY without
DP capability. While at it also remove "qcom,qmp-v3-usb3-phy"
compatible string which was earlier added for sdm845
only as there wouldn't be any user of same.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt

@@ -9,7 +9,8 @@ Required properties:
 	       "qcom,ipq8074-qmp-pcie-phy" for PCIe phy on IPQ8074
 	       "qcom,msm8996-qmp-pcie-phy" for 14nm PCIe phy on msm8996,
 	       "qcom,msm8996-qmp-usb3-phy" for 14nm USB3 phy on msm8996,
-	       "qcom,qmp-v3-usb3-phy" for USB3 QMP V3 phy.
+	       "qcom,sdm845-qmp-usb3-phy" for USB3 QMP V3 phy on sdm845,
+	       "qcom,sdm845-qmp-usb3-uni-phy" for USB3 QMP V3 UNI phy on sdm845.
 
  - reg: offset and length of register set for PHY's common serdes block.