e1000e: i219 execute unit hang fix on every reset or power state transition

e1000e: i219 execute unit hang fix on every reset or power state transition

Orabug: 21792108

After testing various cases, the conclusion is that the fix MUST be
executed BEFORE any event that the HW is reset or transition to D3.
To fix that I moved the execution to the relevant places but per
Alexander Duyck's review, ensure now that the DMA is valid and was not
freed before manipulating the ring.

Signed-off-by: Yanir Lubetkin <yanirx.lubetkin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 0ffc56464bbbb8e2a78e319a36e1eafcbaaab9d8)
Signed-off-by: Brian Maly <brian.maly@oracle.com>