net: netprio_cgroup: make net_prio_subsys static

net_prio_subsys can be made static this removes the sparse
warning it was throwing.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/netprio_cgroup.c

@@ -28,7 +28,7 @@ static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
 static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
 static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp);
 
-struct cgroup_subsys net_prio_subsys = {
+static struct cgroup_subsys net_prio_subsys = {
 	.name		= "net_prio",
 	.create		= cgrp_create,
 	.destroy	= cgrp_destroy,