mac802154: add hardware address filter flag

Overdue introduction for address filtering hardware flag. Furthermore we
will check and set address filtering on interface up. This patch
prepares that we can check if an transceiver supports address filtering
option. Currently all mainline driver supports hardware address filtering.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Cc: Alan Ott <alan@signal11.us>
Cc: Varka Bhadram <varkabhadram@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/mac802154.h

@@ -90,6 +90,8 @@ struct ieee802154_hw {
 #define IEEE802154_HW_CSMA_PARAMS	0x00000040
 /* Indicates that transceiver will support ARET frame retries setting. */
 #define IEEE802154_HW_FRAME_RETRIES	0x00000080
+/* Indicates that transceiver will support hardware address filter setting. */
+#define IEEE802154_HW_AFILT		0x00000100
 
 /* This groups the most common CSMA support fields into one. */
 #define IEEE802154_HW_CSMA		(IEEE802154_HW_CCA_MODE | \