Merge branch 'net-dsa-bcm_sf2-Add-support-for-optional-reset-controller-line'

Florian Fainelli says:

====================
net: dsa: bcm_sf2: Add support for optional reset controller line

This patch series definest the optional reset controller line for the
BCM7445/BCM7278 integrated Ethernet switches and updates the driver to
drive that reset line in lieu of the internal watchdog based reset since
it does not work on BCM7278.

Changes in v2:
- make the reset_control_assert() conditional to BCM7278 in the remove
  function as well
====================

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