MLK-21052-07 net: fec: Fix fec_devtype[IMX8QM] being imx6ul-fec

This was incorrectly added to the fec_devtype array only by commit
088c766a5c04 ("MLK-10724-6 net: fec: add i.mx6ul enet support")

The rest of 8qm support was later added by commit d1a46676c8b8
("MLK-16781 net: fec: add eee mode tx lpi support")

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>