s390/cio: rename struct channel_path_desc

Rename struct channel_path_desc to struct channel_path_desc_fmt0
to fit the scheme. Provide a macro for the function wrappers that
gather this and related data from firmware.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/net/qeth_core_main.c

@@ -1361,7 +1361,7 @@ static void qeth_set_multiple_write_queues(struct qeth_card *card)
 static void qeth_update_from_chp_desc(struct qeth_card *card)
 {
 	struct ccw_device *ccwdev;
-	struct channel_path_desc *chp_dsc;
+	struct channel_path_desc_fmt0 *chp_dsc;
 
 	QETH_DBF_TEXT(SETUP, 2, "chp_desc");