Merge branch 'SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS-get-remove'

Merge branch 'SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS-get-remove'

Florian Fainelli says:

====================
Remove getting SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS

AFAICT there is no code that attempts to get the value of the attribute
SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS while it is used with
switchdev_port_attr_set().

This is effectively no doing anything and it can slow down future work
that tries to make modifications in these areas so remove that.
====================

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