Merge branch 'dsa-misc-improvements'

Florian Fainelli says:

====================
net: dsa: misc improvements

This patch series builds on top of Andrew's "New DSA bind, switches as devices"
patch set and does the following:

- add a few helper functions/goodies for net/dsa/dsa2.c to be as close as possible
  from net/dsa/dsa.c in terms of what drivers can expect, in particular the slave
  MDIO bus and the enabled_port_mask and phy_mii_mask

- fix the CPU port ethtools ops to work in a multiple tree setup since we can
  no longer assume a single tree is supported

- make the bcm_sf2 driver register its own MDIO bus, yet assign it to
  ds->slave_mii_bus for everything to work in net/dsa/slave.c wrt. PHY probing,
  this is a tad cleaner than what we have now

Changes in v2:

Most of the previous patches have been dropped to just keep the relevant ones
now.

Changes in v3:
- split the addition of the slave MII bus as a separate patch
- properly unwind all operations at the right place and right time (ethtool ops,
  slave MDIO bus
- fixed a few typos here and there

Changes in v4:
- removed superfluous dst agrument to dsa_cpu_port_ethtool_{setup,restore}
====================

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