s390/3270: correct size detection with the read-partition command

The size detection for 3270 terminals with the read-partition command is
broken. The raw3270_reset_device_cb function clears the init_data array,
but if raw3270_writesf_readpart has been called the read-partition command
is queued which needs the init_data array. In this case the size detection
will fail and the invalid command does funny things to the terminal.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/char/raw3270.c

@@ -633,7 +633,6 @@ raw3270_reset_device_cb(struct raw3270_request *rq, void *data)
 	} else
 		raw3270_writesf_readpart(rp);
 	memset(&rp->init_reset, 0, sizeof(rp->init_reset));
-	memset(&rp->init_data, 0, sizeof(rp->init_data));
 }
 
 static int