net: mvmdio: doc: mvmdio now used by mv643xx_eth
net: mvmdio: doc: mvmdio now used by mv643xx_eth

Amend the documentation in the mvmdio driver to note the fact
that it is now used by both the mvneta and mv643xx_eth drivers.

Signed-off-by: Leigh Brown <273d69efa9a4f6fa24a2550bb0539f4eaa8e24aa@solinno.co.uk>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs