Merge branch 'phylib-regressions-part-2'

Andrew Lunn says:

====================
Part 2 of v4.5-rc1 phylib regression

White list PHY compatible values which indicate PHYs.  Issue a warning
when one is encountered.

Update the documentation to make it clear what is expected in the
compatible string.

v2:
Fix Grammar, reword changelog, add Tested-by and Acked-by.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>