wl12xx: set the ELP entry delay to the FW dyn-ps timeout

With PSM handled in FW, the checks in wl1271_elp_work() are always true.
Thus during active traffic we constantly enter and exit ELP (many times
per second). As each ELP exit takes ~10ms, this can have an adverse
effect on throughput and interactivity.
Set the ELP timeout to the dyn-ps timeout. This period is longer and
avoids the above problem. It also makes sense to stay out of ELP while
we are awake on the network, to minimize delays in Tx/Rx. The same thing
was done by the mac80211 dynamic-ps mechanism before the FW DPS changes.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/ps.c

@@ -69,8 +69,6 @@ void wl1271_elp_work(struct work_struct *work)
 	mutex_unlock(&wl->mutex);
 }
 
-#define ELP_ENTRY_DELAY  5
-
 /* Routines to toggle sleep mode while in ELP */
 void wl1271_ps_elp_sleep(struct wl1271 *wl)
 {
@@ -90,7 +88,7 @@ void wl1271_ps_elp_sleep(struct wl1271 *wl)
 	}
 
 	ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
-				     msecs_to_jiffies(ELP_ENTRY_DELAY));
+		msecs_to_jiffies(wl->conf.conn.dynamic_ps_timeout));
 }
 
 int wl1271_ps_elp_wakeup(struct wl1271 *wl)