wl1271: Set PSM support flags in driver configuration

Set the PSM support flag in the device configuration
for the mac80211 stack. This will enable usage of powersave.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_main.c

@@ -1753,7 +1753,8 @@ static int wl1271_init_ieee80211(struct wl1271 *wl)
 
 	wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
 		IEEE80211_HW_NOISE_DBM |
-		IEEE80211_HW_BEACON_FILTER;
+		IEEE80211_HW_BEACON_FILTER |
+		IEEE80211_HW_SUPPORTS_PS;
 
 	wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
 	wl->hw->wiphy->max_scan_ssids = 1;