[SCSI] qla2xxx: Populate Command Type 6 LUN field properly.

Use the host_to_fcp_swap call to correctly populate the LUN field
in the Command Type 6 path.  This field is used during LUN reset
cleanup and must match the field used in the FCP command.

Cc: stable@kernel.org
Signed-off-by: Mike Hernandez <michael.hernandez@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>