qlnxe: Prevent potential concurrency between ioctls

The driver-managed status flags should be lock protected to be touched.
Also this can serialize ioctls those check the IFF_DRV_RUNNING status.

Reviewed by: kbowling
MFC after: 5 days
Differential Revision: https://reviews.freebsd.org/D54886

(cherry picked from commit 0df8a998a9fe28af659cb401c537c6d785e55f81)