The headerfile is used in the kernel for access of MDIO Managed Devices
(MMD) indirect access. Some drivers already use those device addresses.
We add the headerfile from the kernel and change the current users to
use the defines instead

Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

and remove duplicates from other drivers

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Port driver for TI DP83867 Gigabit Ethernet PHY from linux.

Signed-off-by: Thomas Haemmerle <thomas.haemmerle@wolfvision.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>