[SCSI] iscsi_tcp: Change iscsi_sw_tcp_conn_restore_callbacks arguments

This patch changes the arguments to iscsi_sw_tcp_conn_restore_callbacks,
so that it works like the function to set the callbacks and because
in upcoming patches we need a iscsi_conn.

Signed-off-by: Avi Kaplan <savik751@gmail.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>