[S390] cio: Get rid of _ccw_device_get_device_number().

The function shouldn't have existed in the first place (not MSS-aware).
Introduce a new function ccw_device_get_id() that extracts the
ccw_dev_id structure of a ccw device and convert all users of
_ccw_device_get_device_number to ccw_device_get_id.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 8facd14..f6ef90e 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -589,9 +589,10 @@
 __raw3270_size_device_vm(struct raw3270 *rp)
 {
 	int rc, model;
+	struct ccw_dev_id dev_id;
 
-	raw3270_init_diag210.vrdcdvno = 
-		_ccw_device_get_device_number(rp->cdev);
+	ccw_device_get_id(rp->cdev, &dev_id);
+	raw3270_init_diag210.vrdcdvno = dev_id.devno;
 	raw3270_init_diag210.vrdclen = sizeof(struct diag210);
 	rc = diag210(&raw3270_init_diag210);
 	if (rc)