[S390] css: Use css_device_id for bus matching.

css_device_id exists, so use it for determining the right driver
(and add a match_flags which is always 1 for valid types).

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 38bf9dd..58020bf 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -75,7 +75,7 @@
  */
 struct css_driver {
 	struct module *owner;
-	unsigned int subchannel_type;
+	struct css_device_id *subchannel_type;
 	struct device_driver drv;
 	void (*irq)(struct subchannel *);
 	int (*chp_event)(struct subchannel *, struct chp_link *, int);