bareudp: constify device_type declaration

device_type may be declared as const.
Signed-off-by: NJonas Bonn <jonas@norrbonn.se>
Link: https://lore.kernel.org/r/20201202122324.564918-1-jonas@norrbonn.seSigned-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/bareudp.c

@@ -522,7 +522,7 @@ static const struct nla_policy bareudp_policy[IFLA_BAREUDP_MAX + 1] = {
 };
 
 /* Info for udev, that this is a virtual tunnel endpoint */
-static struct device_type bareudp_type = {
+static const struct device_type bareudp_type = {
 	.name = "bareudp",
 };