net: phy: add phy_set_eee_broken

Add an accessor for eee_broken_modes, so that drivers
don't have to deal with phylib internals.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/0f8ee279-d40d-4489-a3b0-d993472d744a@gmail.com


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