[S390] tape: New read configuration data.

Instead of the deprecated read_conf_data(), implement a new function
tape_3590_read_dev_chars().

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index e2a8a1a..2fae633 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -73,7 +73,7 @@
 	[TO_DIS] = "DIS",	[TO_ASSIGN] = "ASS",
 	[TO_UNASSIGN] = "UAS",  [TO_CRYPT_ON] = "CON",
 	[TO_CRYPT_OFF] = "COF",	[TO_KEKL_SET] = "KLS",
-	[TO_KEKL_QUERY] = "KLQ",
+	[TO_KEKL_QUERY] = "KLQ",[TO_RDC] = "RDC",
 };
 
 static int
@@ -911,6 +911,7 @@
 		case TO_ASSIGN:
 		case TO_UNASSIGN:
 		case TO_READ_ATTMSG:
+		case TO_RDC:
 			if (device->tape_state == TS_INIT)
 				break;
 			if (device->tape_state == TS_UNUSED)