Add PKTCNT_POLL command to get TX packet counters

- for the new WiFi watchdog
- requires kernel support (see issue 6874044)

Change-Id: Ibb59c1e0df6f5422814f2260588651e0e1490ccc
diff --git a/wpa_supplicant/driver_i.h b/wpa_supplicant/driver_i.h
index f968251..4f2ec79 100644
--- a/wpa_supplicant/driver_i.h
+++ b/wpa_supplicant/driver_i.h
@@ -463,6 +463,14 @@
 	return -1;
 }
 
+static inline int wpa_drv_pktcnt_poll(struct wpa_supplicant *wpa_s,
+				      struct hostap_sta_driver_data *sta)
+{
+	if (wpa_s->driver->read_sta_data)
+		return wpa_s->driver->read_sta_data(wpa_s->drv_priv, sta, wpa_s->own_addr);
+	return -1;
+}
+
 static inline int wpa_drv_set_ap_wps_ie(struct wpa_supplicant *wpa_s,
 					const struct wpabuf *beacon,
 					const struct wpabuf *proberesp,