staging: wfx: enable powersave on probe

In the old days, ieee80211 powersave has some impact on the Rx speed.
These problems are solved for a long time now. There is no more reason
to not enabling it.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200825085828.399505-10-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/main.c

@@ -285,7 +285,6 @@ struct wfx_dev *wfx_init_common(struct device *dev,
 	hw->wiphy->features |= NL80211_FEATURE_AP_SCAN;
 	hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
 	hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
-	hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 	hw->wiphy->max_ap_assoc_sta = HIF_LINK_ID_MAX;
 	hw->wiphy->max_scan_ssids = 2;
 	hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;