[Intel-wired-lan] [next PATCH S26 06/12] i40e: fix: do not sleep in netdev_ops

[Kavalur, Deepthi]

There was another commit on 3-Dec that reverted/modified the i40e_set_mac(). 
3-Dec: https://git.kernel.org/cgit/linux/kernel/git/jkirsher/next-queue.git/commit/?h=dev-queue&id=ea02e90b4b49782462d06a425e05c776909fbae4

Only the missing part of the below commit is getting added in this patch.
2-Dec: https://git.kernel.org/cgit/linux/kernel/git/jkirsher/next-queue.git/commit/drivers/net/ethernet/intel/i40e?id=0e4425ed641f3eef67c892bc541949cd745a9ba9.