Revert "ixgbe: release lock for the duration of ixgbe_suspend_close()"

This reverts commit 6710f970

.

Gotta love when developers have offline discussions, thinking everyone
is reading their responses/dialog.

The change had the potential for a number of race conditions on
shutdown, which is why we are reverting the change.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>