Merge branch 'dsa-mv88e6xxx-ops-cosmetics'

Vivien Didelot says:

====================
net: dsa: mv88e6xxx: ops cosmetics

This patchset brings no functional changes. It is a first step in a
bigger cosmetics change to the driver. It simplifies print messages and
polishes data types and chip operations.

The next patchs will only prefix and document the port registers macros.

Changes in v2:
  - KISS and simply use dev_* since chip->ds may not be initialized
  - add reviewers tags
====================

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