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.

Approved by: re (cperciva)
Reviewed by: kbowling
MFC after: 5 days
Differential Revision: https://reviews.freebsd.org/D54886

(cherry picked from commit 0df8a998a9fe28af659cb401c537c6d785e55f81)
(cherry picked from commit 285b25c080faf71c60de36e834ef31cf70e6b50d)
(cherry picked from commit 6e5b12acb66a9e269801b8d88c8f9838044d631c)