macsec: add missing attribute validation for offload

Add missing attribute validation for IFLA_MACSEC_OFFLOAD
to the netlink policy.

Fixes: 791bb3f ("net: macsec: add support for specifying offload upon link creation")
Signed-off-by: Emeel Hakim <[email protected]>
Reviewed-by: Jiri Pirko <[email protected]>
Reviewed-by: Sabrina Dubroca <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Emeel Hakim

drivers/net/macsec.c

@@ -3698,6 +3698,7 @@ static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
 	[IFLA_MACSEC_SCB] = { .type = NLA_U8 },
 	[IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
 	[IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
+	[IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 },
 };
 
 static void macsec_free_netdev(struct net_device *dev)