ath10k: fix naming Peer stats rssi_changed field in 10.2.4

Fix naming of peer stats rssi_changed field in 10.2.4 to make it
more readable. As of now this field is not used, but necessary to
pull in fw_stats with appropriate length.
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/wmi.h

@@ -4233,7 +4233,7 @@ struct wmi_10_2_peer_stats {
 
 struct wmi_10_2_4_peer_stats {
 	struct wmi_10_2_peer_stats common;
-	__le32 unknown_value; /* FIXME: what is this word? */
+	__le32 peer_rssi_changed;
 } __packed;
 
 struct wmi_10_2_4_ext_peer_stats {