[S390] cio: introduce fcx enabled scsw format

Extend the scsw data structure to the format required by fcx. Also
provide helper functions for easier access to fields which are present
in both the traditional as well as the modified format.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@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/char/fs3270.c b/drivers/s390/char/fs3270.c
index ef36f213..f0d67af 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -216,17 +216,17 @@
 fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb)
 {
 	/* Handle ATTN. Set indication and wake waiters for attention. */
-	if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
+	if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
 		fp->attention = 1;
 		wake_up(&fp->wait);
 	}
 
 	if (rq) {
-		if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
+		if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
 			rq->rc = -EIO;
 		else
 			/* Normal end. Copy residual count. */
-			rq->rescnt = irb->scsw.count;
+			rq->rescnt = irb->scsw.cmd.count;
 	}
 	return RAW3270_IO_DONE;
 }