Revert "dt-bindings: usb: cdns,usb3: document USBSSP controller support"

This reverts commit fb14e7f7cb.

There were some build issues as reported by Arnd, so revert this for
now.

Cc: Peter Chen <peter.chen@cixtech.com>
Cc: Pawel Laszczak <pawell@cadence.com>
Reported-by: Arnd Bergmann <arnd@kernel.org>
Link: https://lore.kernel.org/r/ac+LEWMCQpLSnfoD@nchen-desktop
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/cdns,usb3.yaml

@@ -4,17 +4,11 @@
 $id: http://devicetree.org/schemas/usb/cdns,usb3.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Cadence USBSS and USBSSP DRD controller
+title: Cadence USBSS-DRD controller
 
 maintainers:
   - Pawel Laszczak <pawell@cadence.com>
 
-description:
-  Cadence USB dual-role controller. Covers USBSS (SuperSpeed, USB 3.0) and
-  USBSSP (SuperSpeed Plus, USB 3.1 gen2x1). Both variants share the same
-  DRD/OTG register interface, so the driver auto-detects the controller
-  version at runtime.
-
 properties:
   compatible:
     const: cdns,usb3
@@ -55,7 +49,7 @@ properties:
       cdns3 to type C connector.
 
   maximum-speed:
-    enum: [super-speed-plus, super-speed, high-speed, full-speed]
+    enum: [super-speed, high-speed, full-speed]
 
   phys:
     minItems: 1