[SCSI] be2iscsi: Fixing initialization of can_queue

This patch fixes can_queue being uninitiallized since it
was done before beiscsi_get_params was called.

Thanks to Mike Christie for identifying this

Signed-off-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>