b43legacy: include full 64-bit timestamp in monitor mode

When monitor mode is enabled, this will make b43legacy read out
the full 64-bit MAC time from the chip for each received packet.

This patch has been ported from b43.
Signed-off-by: NStefano Brivio <stefano.brivio@polimi.it>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43legacy/b43legacy.h

@@ -599,6 +599,8 @@ struct b43legacy_wl {
 	/* List of all wireless devices on this chip */
 	struct list_head devlist;
 	u8 nr_devs;
+
+	bool radiotap_enabled;
 };
 
 /* Pointers to the firmware data and meta information about it. */

drivers/net/wireless/b43legacy/main.c

@@ -2553,6 +2553,8 @@ static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
 			b43legacy_short_slot_timing_disable(dev);
 	}
 
+	dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
+
 	/* Adjust the desired TX power level. */
 	if (conf->power_level != 0) {
 		if (conf->power_level != phy->power_level) {