ath9k: Fix IBSS joiner mode

On joining an existing IBSS network, beaconing has to start
only after a TSF sync has happened by receiving a beacon from
the BSS. In creator mode, beaconing can start immediately after
a HW reset has been done.

Now that mac80211 notifies the driver of the mode type (creator/joiner)
via ieee80211_bss_conf->ibss_creator, make use of it to properly setup
the HW beacon timers.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/recv.c

@@ -533,7 +533,7 @@ static void ath_rx_ps_beacon(struct ath_softc *sc, struct sk_buff *skb)
 	if (sc->ps_flags & PS_BEACON_SYNC) {
 		sc->ps_flags &= ~PS_BEACON_SYNC;
 		ath_dbg(common, PS,
-			"Reconfigure Beacon timers based on timestamp from the AP\n");
+			"Reconfigure beacon timers based on synchronized timestamp\n");
 		ath9k_set_beacon(sc);
 	}