scsi: qla2xxx: Refer directly to the qla2xxx_driver_template

Access the qla2xxx_driver_template data structure directly instead of via
the host pointer. This patch prepares for declaring the 'hostt' pointer
const.

Cc: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230322195515.1267197-2-bvanassche@acm.org


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>