i40e: suspend scheduling during driver unload

i40e: suspend scheduling during driver unload

Orabug: 22342532

We need to suspend scheduling or any pending service task during driver
unload process, so that new task will not be scheduled. This patch sets
the suspend flag bit during reload which avoids service task execution.

Change-ID: I017c57b5d6656564556e3c5387da671369a572ac
Signed-off-by: Pandi Kumar Maharajan <pandi.maharajan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit a4618ec88de95a86f290d01c74c506552f1a5d95)
Signed-off-by: Brian Maly <brian.maly@oracle.com>