bcmgenet, sun8i_emac: Don't connect PHY two times

The bcmgenet and sun8i_emac drivers call phy_connect(), which finds /
creates the PHY and also connects it to the eth device via
phy_connect_dev(), then set some phydev members (bcmgenet only), and
then call phy_connect_dev() explicitly again.

Drop the second phy_connect_dev(), since it is unnecesary.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>