[SCSI] be2iscsi: Fix dynamic CID allocation Mechanism in driver

Number of CID assigned to a function from adapter can be dynamic. The CID count
for each function was fixed number before. Code Fix done so that adapters with
fixed/dynamic CID count will work with the driver.

Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>