vrf: Update to register_net_sysctl_sz

Move from register_net_sysctl to register_net_sysctl_sz and pass the
ARRAY_SIZE of the ctl_table array that was used to create the table
variable. We need to move to the new function in preparation for when we
change SIZE_MAX to ARRAY_SIZE() in the register_net_sysctl macro.
Failing to do so would erroneously allow ARRAY_SIZE() to be called on a
pointer. The actual change from SIZE_MAX to ARRAY_SIZE will take place
in subsequent commits.

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

drivers/net/vrf.c

@@ -1979,7 +1979,8 @@ static int vrf_netns_init_sysctl(struct net *net, struct netns_vrf *nn_vrf)
 	/* init the extra1 parameter with the reference to current netns */
 	table[0].extra1 = net;
 
-	nn_vrf->ctl_hdr = register_net_sysctl(net, "net/vrf", table);
+	nn_vrf->ctl_hdr = register_net_sysctl_sz(net, "net/vrf", table,
+						 ARRAY_SIZE(vrf_table));
 	if (!nn_vrf->ctl_hdr) {
 		kfree(table);
 		return -ENOMEM;