scsi: qla2xxx: fix FW resource count values

This patch fixes issue where current and original exchanges count
were swapped for intiator and targets.

Also fix IOCB count for current and original which were swapped.

Link: https://lore.kernel.org/r/20200226224022.24518-9-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>