Merge branch 'mlxsw-dcb-fixes'

Ido Schimmel says:

====================
mlxsw: DCB fixes

Patches 1 and 2 fix a problem in which PAUSE frames settings are wrongly
overridden when ieee_setpfc() gets called.

Patch 3 adds a missing rollback in port's creation error path.
====================

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