Merge branch 'dsa-Fixes-for-mv88e6161'

Andrew Lunn says:

====================
dsa: Fixes for mv88e6161

Testing a board with an mv88e6161 turned up two issues. The PHYs were
not found, because the wrong method to access them was used. The
statistics did not work, because the wrong snapshot method was used
====================

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