e1000: Adding e1000_dump function

When TX hang occurs e1000_dump prints TX ring, RX ring and Device registers.

Signed-off-by: Tushar Dave <tushar.n.dave@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
3 files changed