ixgbevf: Add lock around ixgbevf_reinit_locked call

ixgbevf: Add lock around ixgbevf_reinit_locked call

Orabug: 24568240

The function ixgbevf_reinit_locked() assumes you have the rtnl lock
however we didn't when calling from the service task.  This patch
corrects that.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 8e8247ab98315e096b812a68381ca812f0b0b5e3)
Signed-off-by: Brian Maly <brian.maly@oracle.com>