[PATCH] Make MODULE_DEVICE_TABLE work for vio devices

Make MODULE_DEVICE_TABLE work for vio devices.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 3236d24..f47f009 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -527,7 +527,7 @@
 
 static struct vio_device_id hvcs_driver_table[] __devinitdata= {
 	{"serial-server", "hvterm2"},
-	{ NULL, }
+	{ "", "" }
 };
 MODULE_DEVICE_TABLE(vio, hvcs_driver_table);