drivers: ethernet: phy: vsc8541: allow disabling autonegotiation

Add support for disabling autonegotiation to the cfg_link callback, as
with the phy_mii driver.

Signed-off-by: Robert Hancock <robert.hancock@calian.com>
(cherry picked from commit 45eedaa614014cd287e4c618e7643abe35c23abb)
1 file changed