i40e: Leave debug_mask cleared at init

i40e: Leave debug_mask cleared at init

Orabug: 23176970

Don't set our internal debug_mask at startup unless we get specific signal
to from the debug module parameter.

This should take care of the issue with all the device capabilities getting
printed even when we hadn't asked for the debug info.

Change-ID: I7fbc6bd8b11ed9b0631ec018ff36015a04100b6c
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 89dd05512b79ee9ba0950f1ba1fb8077ec898ea2)
Signed-off-by: Brian Maly <brian.maly@oracle.com>