dt-bindings: net: Reintroduce PHY no lane swap binding

dt-bindings: net: Reintroduce PHY no lane swap binding

This binding was already documented in phy.txt, commit 242b86551ed7
("Documentation: devicetree: Add PHY no lane swap binding"), but got
accidently removed during YAML conversion in commit b53af47eb27e
("dt-bindings: net: Add a YAML schemas for the generic PHY options").

Note: 'enet-phy-lane-no-swap' and the absence of 'enet-phy-lane-swap' are
not identical, as the former one disable this feature, while the latter
one doesn't change anything.

Fixes: b53af47eb27e ("dt-bindings: net: Add a YAML schemas for the generic PHY options")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20211130082756.713919-1-alexander.stein@ew.tq-group.com
Signed-off-by: Rob Herring <robh@kernel.org>