ath9k: Fix channel context timer

Setup the channel context correctly. Not doing this was
causing beacon loss in a P2P-GO/STA concurrent setup.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -294,7 +294,7 @@ static void ath_chanctx_setup_timer(struct ath_softc *sc, u32 tsf_time)
 	ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, tsf_time, 1000000);
 	tsf_time -= ath9k_hw_gettsf32(ah);
 	tsf_time = msecs_to_jiffies(tsf_time / 1000) + 1;
-	mod_timer(&sc->sched.timer, tsf_time);
+	mod_timer(&sc->sched.timer, jiffies + tsf_time);
 
 	ath_dbg(common, CHAN_CTX,
 		"Setup chanctx timer with timeout: %d ms\n", jiffies_to_msecs(tsf_time));