sbus: Auto-load openprom module when device opened.

The openprom module is missing the char-major-10-139 alias that would
cause it to be auto-loaded when a device of that type is opened.  This
patch adds the alias.

Signed-off-by: Scott James Remnant <scott@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c
index 29dc735..124f660 100644
--- a/drivers/sbus/char/openprom.c
+++ b/drivers/sbus/char/openprom.c
@@ -51,6 +51,7 @@
 MODULE_DESCRIPTION("OPENPROM Configuration Driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION("1.0");
+MODULE_ALIAS_MISCDEV(SUN_OPENPROM_MINOR);
 
 /* Private data kept by the driver for each descriptor. */
 typedef struct openprom_private_data