Merge branch 'mvpp2-5gbase-r-support'

Marek Behún says:

====================
Add 5gbase-r support for mvpp2

this adds support for 5gbase-r for mvpp2 driver. Current versions of
TF-A firmware support changing the PHY to 5gbase-r via SMC calls, at
least on Macchiatobin.

Tested on Macchiatobin.
====================

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