cfg80211: add support for per-chain signal strength reporting

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index d1e48b5..cbf1e22 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1991,6 +1991,10 @@
  * @NL80211_STA_INFO_PEER_PM: peer mesh STA link-specific power mode
  * @NL80211_STA_INFO_NONPEER_PM: neighbor mesh STA power save mode towards
  *	non-peer STA
+ * @NL80211_STA_INFO_CHAIN_SIGNAL: per-chain signal strength of last PPDU
+ *	Contains a nested array of signal strength attributes (u8, dBm)
+ * @NL80211_STA_INFO_CHAIN_SIGNAL_AVG: per-chain signal strength average
+ *	Same format as NL80211_STA_INFO_CHAIN_SIGNAL.
  * @__NL80211_STA_INFO_AFTER_LAST: internal
  * @NL80211_STA_INFO_MAX: highest possible station info attribute
  */
@@ -2020,6 +2024,8 @@
 	NL80211_STA_INFO_NONPEER_PM,
 	NL80211_STA_INFO_RX_BYTES64,
 	NL80211_STA_INFO_TX_BYTES64,
+	NL80211_STA_INFO_CHAIN_SIGNAL,
+	NL80211_STA_INFO_CHAIN_SIGNAL_AVG,
 
 	/* keep last */
 	__NL80211_STA_INFO_AFTER_LAST,