Merge branch 'macvlan-Fix-some-issues-with-changing-mac-addresses'

Vladislav Yasevich says:

====================
macvlan: Fix some issues with changing mac addresses

There are some issues in macvlan wrt to changing it's mac address.
* An error is returned in the specified address is the same as an already
  assigned address.
* In passthru mode, the mac address of the macvlan device doesn't change.
* After changing the mac address of a passthru macvlan and then removing it,
  the mac address of the physical device remains changed.

This patch series attempts to resolve these issues.

V2: Address a small issue in p4 where we save the address from the lowerdev
    (from girish.moodalbail@oracle.com)
====================

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