qla4xxx: Fixed BFS with sendtargets as boot index.

qla4xxx: Fixed BFS with sendtargets as boot index.

If ql4xdisablesysfsboot = 0 and sendtargets entry as boot index then
driver does export sendtarget entries in sysfs but iscsistart does not
do discovery. So in this case let driver do the discovery and
login to the targets.

JIRA Key: IUEKR2ISCSI-9

Signed-off-by: Manish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: Nilesh Javali <nilesh.javali@qlogic.com>
Signed-off-by: Tej Parkash <tej.parkash@qlogic.com>