bus: moxtet: declare moxtet_bus_type as static

This symbol is not meant to be used from elsewhere.

Cc: Ben Dooks <ben.dooks@codethink.co.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

drivers/bus/moxtet.c

@@ -102,12 +102,11 @@ static int moxtet_match(struct device *dev, struct device_driver *drv)
 	return 0;
 }
 
-struct bus_type moxtet_bus_type = {
+static struct bus_type moxtet_bus_type = {
 	.name		= "moxtet",
 	.dev_groups	= moxtet_dev_groups,
 	.match		= moxtet_match,
 };
-EXPORT_SYMBOL_GPL(moxtet_bus_type);
 
 int __moxtet_register_driver(struct module *owner,
 			     struct moxtet_driver *mdrv)