scsi: MAINTAINERS: Add the linux-scsi mailing list to the ISCSI entry

Most people who review iSCSI are following linux-scsi, but some are not in
open-scsi. Make sure we are routing iSCSI patches to the right list.

Link: https://lore.kernel.org/r/85h82rvqza.fsf@collabora.com
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

MAINTAINERS

@@ -8665,6 +8665,7 @@ ISCSI
 M:	Lee Duncan <lduncan@suse.com>
 M:	Chris Leech <cleech@redhat.com>
 L:	open-iscsi@googlegroups.com
+L:	linux-scsi@vger.kernel.org
 W:	www.open-iscsi.com
 S:	Maintained
 F:	drivers/scsi/*iscsi*