radiotap: add 0-length PSDU "not captured" type

This type was defined in radiotap but we didn't add it to the
header file, add it now.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/ieee80211_radiotap.h

 /*
  * Copyright (c) 2017		Intel Deutschland GmbH
- * Copyright (c) 2018		Intel Corporation
+ * Copyright (c) 2018-2019	Intel Corporation
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -343,6 +343,7 @@ struct ieee80211_radiotap_lsig {
 
 enum ieee80211_radiotap_zero_len_psdu_type {
 	IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING		= 0,
+	IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED		= 1,
 	IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR			= 0xff,
 };