dt-bindings: phy: armada-cp110-utmi: add optional swap-dx-lanes property

Armada CP110 UTMI supports swapping D+ and D- signals.
usb251xb.yaml already describes a suitable device-tree property for the
same purpose but as child usb controller node.

Add optional swap-dx-lanes device-tree property to armada cp110 utmi phy
with same semantics as usb251xb:
The property lists all ports that swap D+ and D-, unlisted ports are
considered correct.

Signed-off-by: Josua Mayer <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

Documentation/devicetree/bindings/phy/marvell,armada-cp110-utmi-phy.yaml

···
       Phandle to the system controller node
     $ref: /schemas/types.yaml#/definitions/phandle
 
+  swap-dx-lanes:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: |
+      Specifies the ports which will swap the differential-pair (D+/D-),
+      default is not-swapped.
+
 # Required child nodes:
 
 patternProperties: