scsi: qla2xxx: Replace __qla2x00_marker()'s missing underscores

scsi: qla2xxx: Replace __qla2x00_marker()'s missing underscores

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/qla2xxx/qla_iocb.c:508: warning: expecting prototype for qla2x00_marker(). Prototype was for __qla2x00_marker() instead

Link: https://lore.kernel.org/r/20210303144631.3175331-16-lee.jones@linaro.org
Cc: Nilesh Javali <njavali@marvell.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Acked-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>