[S390] cio: Don't spam debug feature.

Lower priority of "Blacklisted device detected" messages so we don't
overwrite more useful messages.

Signed-off-by: Cornelia Huck <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

drivers/s390/cio/cio.c

···
 		 * This device must not be known to Linux. So we simply
 		 * say that there is no device and return ENODEV.
 		 */
-		CIO_MSG_EVENT(0, "Blacklisted device detected "
+		CIO_MSG_EVENT(4, "Blacklisted device detected "
 			      "at devno %04X, subchannel set %x\n",
 			      sch->schib.pmcw.dev, sch->schid.ssid);
 		err = -ENODEV;