bcm87xx: disable autonegotiation by default

The bcm87xx phys don't support autonegotiation, so don't use it by
default, as otherwise phy_state_machine() will try to enable it (using
c22 requests, which also don't make any sense for the bcm78xx).

Signed-off-by: Peter Korsgaard <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/phy/bcm87xx.c

···
 	phydev->supported = SUPPORTED_10000baseR_FEC;
 	phydev->advertising = ADVERTISED_10000baseR_FEC;
 	phydev->state = PHY_NOLINK;
+	phydev->autoneg = AUTONEG_DISABLE;
 
 	bcm87xx_of_reg_init(phydev);