net: phy: remove genphy_config_eee_advert

bcm_config_lre_aneg() doesn't use genphy_config_eee_advert() any longer.
As this was the only user, we can remove genphy_config_eee_advert() now.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/37da7f3e-b883-4c07-9881-b8c0516822b7@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>