Revert "net: macb: Specify PHY PM management done by MAC"

This reverts commit 18c60b38 which is
commit 15a9dbec upstream.

It required commit 744d23c7 ("net: phy: Warn about incorrect
mdio_bus_phy_resume() state") which was reverted from the Android kernel
tree due to it breaking the ABI, so this change too is not needed.

Bug: 161946584
Change-Id: I1874d1891f515e07a2b2b3cfa6fb811f4c33af15
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>