greybus: connection: fix duplicating naming in _gb_hd_connection_insert()

Though this doesn't cause any logical issues as far as the behavior of the
routine is concerned as the local variable would be considered inside the
'while' loop.

But its better not to use the same name for variables at different levels.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/staging/greybus/connection.c

@@ -23,13 +23,13 @@ static void _gb_hd_connection_insert(struct greybus_host_device *hd,
 	u16 cport_id = connection->hd_cport_id;
 
 	while (*link) {
-		struct gb_connection *connection;
+		struct gb_connection *_connection;
 
 		above = *link;
-		connection = rb_entry(above, struct gb_connection, hd_node);
-		if (connection->hd_cport_id > cport_id)
+		_connection = rb_entry(above, struct gb_connection, hd_node);
+		if (_connection->hd_cport_id > cport_id)
 			link = &above->rb_left;
-		else if (connection->hd_cport_id < cport_id)
+		else if (_connection->hd_cport_id < cport_id)
 			link = &above->rb_right;
 	}
 	rb_link_node(node, above, link);