[S390] cio: Remove cio_msg kernel parameter.

The only sporadically used CIO_DEBUG messages are replaced by ordinary
CIO_MSG_EVENT messages. The CIO_MSG_EVENT messages debug levels are
consolidated.

Signed-off-by: Michael Ernst <mernst@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 595e327..a769565 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -570,7 +570,7 @@
 {
 	int ret;
 
-	CIO_MSG_EVENT(2, "reprobe start\n");
+	CIO_MSG_EVENT(4, "reprobe start\n");
 
 	need_reprobe = 0;
 	/* Make sure initial subchannel scan is done. */
@@ -578,7 +578,7 @@
 		   atomic_read(&ccw_device_init_count) == 0);
 	ret = for_each_subchannel_staged(NULL, reprobe_subchannel, NULL);
 
-	CIO_MSG_EVENT(2, "reprobe done (rc=%d, need_reprobe=%d)\n", ret,
+	CIO_MSG_EVENT(4, "reprobe done (rc=%d, need_reprobe=%d)\n", ret,
 		      need_reprobe);
 }