ar9170: uncomment powermgt case handle

This patch uncomment a few lines that survived the RFCs.
However, there is not much to worry about, since AP mode is
not officially advertised and supported.
Signed-off-by: NChristian Lamparter <chunkeey@web.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ar9170/mac.c

@@ -283,9 +283,9 @@ int ar9170_set_operating_mode(struct ar9170 *ar)
 		case NL80211_IFTYPE_ADHOC:
 			pm_mode |= AR9170_MAC_REG_POWERMGT_IBSS;
 			break;
-/*		case NL80211_IFTYPE_AP:
+		case NL80211_IFTYPE_AP:
 			pm_mode |= AR9170_MAC_REG_POWERMGT_AP;
-			break;*/
+			break;
 		case NL80211_IFTYPE_WDS:
 			pm_mode |= AR9170_MAC_REG_POWERMGT_AP_WDS;
 			break;