scsi: qla2xxx: Remove the __packed annotation from struct fcp_hdr and fcp_hdr_le

scsi: qla2xxx: Remove the __packed annotation from struct fcp_hdr and fcp_hdr_le

Remove the __packed annotation from struct fcp_hdr* because that annotation
is not necessary for these data structures.

Link: https://lore.kernel.org/r/20200629225454.22863-3-bvanassche@acm.org
Cc: Nilesh Javali <njavali@marvell.com>
Cc: Quinn Tran <qutran@marvell.com>
Cc: Himanshu Madhani <himanshu.madhani@oracle.com>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>