dt-bindings: phy: uniphier-usb3: Add bindings for NX1 SoC

Update USB3-PHY binding document for UniPhier NX1 SoC. Add SS-PHY and
HS-PHY compatible strings for the SoC to the document.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1635503947-18250-2-git-send-email-hayashi.kunihiko@socionext.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/socionext,uniphier-usb3hs-phy.yaml

@@ -22,6 +22,7 @@ properties:
       - socionext,uniphier-pxs2-usb3-hsphy
       - socionext,uniphier-ld20-usb3-hsphy
       - socionext,uniphier-pxs3-usb3-hsphy
+      - socionext,uniphier-nx1-usb3-hsphy
 
   reg:
     maxItems: 1

Documentation/devicetree/bindings/phy/socionext,uniphier-usb3ss-phy.yaml

@@ -23,6 +23,7 @@ properties:
       - socionext,uniphier-pxs2-usb3-ssphy
       - socionext,uniphier-ld20-usb3-ssphy
       - socionext,uniphier-pxs3-usb3-ssphy
+      - socionext,uniphier-nx1-usb3-ssphy
 
   reg:
     maxItems: 1