wl1251: change psm enabled/disabled info to debug

With shorter CAM timeouts, the logs get flooded with "psm enabled" and "psm
disabled traces.  This patch changes it from wl1251_info to wl1251_debug, so
they are only shown if DEBUF_PSM is enabled.
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Reviewed-by: Janne Ylalehto <janne.ylalehto@nokia.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1251_main.c

@@ -542,7 +542,7 @@ static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 		goto out_sleep;
 
 	if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
-		wl1251_info("psm enabled");
+		wl1251_debug(DEBUG_PSM, "psm enabled");
 
 		wl->psm_requested = true;
 
@@ -554,7 +554,7 @@ static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 		ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 	} else if (!(conf->flags & IEEE80211_CONF_PS) &&
 		   wl->psm_requested) {
-		wl1251_info("psm disabled");
+		wl1251_debug(DEBUG_PSM, "psm disabled");
 
 		wl->psm_requested = false;