Merge branch 'bcm7xxx_workaround'

Florian Fainelli says:

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net: phy: bcm7xxx initial read/write workaround

This patch series fixes occasional BCM7xxx PHY driver binding failure due
to a harware bug where the first read or write does not come out of the PHY
MDIO management controller.

Since we have two different MDIO controllers using this PHY, a similar
need to be replicated in GENET and UniMAC MDIO.
====================

Signed-off-by: David S. Miller <[email protected]>