wl1271: Mask unneeded events from firmware to conserve power

Currently several events are enabled from the firmware for which there
is no handling. This wakes up the host unnecessarily. Mask those
unneeded events.
Signed-off-by: NJuuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: NLuciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: NLuciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_boot.c

@@ -390,8 +390,9 @@ static int wl1271_boot_run_firmware(struct wl1271 *wl)
 	/* enable gpio interrupts */
 	wl1271_boot_enable_interrupts(wl);
 
-	/* unmask all mbox events  */
-	wl->event_mask = 0xffffffff;
+	/* unmask required mbox events  */
+	wl->event_mask = BSS_LOSE_EVENT_ID |
+		SCAN_COMPLETE_EVENT_ID;
 
 	ret = wl1271_event_unmask(wl);
 	if (ret < 0) {