arm64: dts: imx8mm-kontron-bl-osm-s: Fix Ethernet PHY compatible
According to motorcomm,yt8xxx.yaml, the compatible string must be
only 'ethernet-phy-id4f51.e91b'.
Remove 'ethernet-phy-ieee802.3-c22' to fix the following dt-schema warning:
imx8mm-kontron-bl-osm-s.dtb: ethernet-phy@0: compatible: ['ethernet-phy-id4f51.e91b', 'ethernet-phy-ieee802.3-c22'] is too long
from schema $id: http://devicetree.org/schemas/net/motorcomm,yt8xxx.yaml#
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>