linux-imx

net: phylink: make QSGMII a valid PHY mode for in-band AN

QSGMII is just SGMII clocked at a higher frequency (5 Gbaud vs 1.25
Gbaud). Logically it is just 4 SGMII interfaces multiplexed onto the
same physical lanes. Each MAC PCS has its own in-band AN process with
the system side of the QSGMII PHY, which is identical to the regular
SGMII AN process. So allow QSGMII as a valid in-band AN mode.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>