[SCSI] qla2xxx: Correct handling of AENs postings for vports.

Initialize all proper structure members in order to support
work-list vport processing.  This code also properly acquires the
correct (physical hardware_lock) lock during work submission.

Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>