ieee802154: Add support for allowing to answer BEACON_REQ

Accept beaconing configurations from the user which involve answering
beacon requests rather than only passively sending beacons. This may
help devices to find the PAN more quickly.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230310145346.1397068-4-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

Author: miquelraynal

net/ieee802154/nl802154.c

@@ -233,7 +233,7 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
 		NLA_POLICY_RANGE(NLA_U8, NL802154_SCAN_DONE_REASON_FINISHED,
 				 NL802154_SCAN_DONE_REASON_ABORTED),
 	[NL802154_ATTR_BEACON_INTERVAL] =
-		NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_SCAN_DURATION),
+		NLA_POLICY_MAX(NLA_U8, IEEE802154_ACTIVE_SCAN_DURATION),
 
 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
 	[NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },