wl1271: Reduce PSM entry hang over period from 128 => 1 ms

Currently, we configure a 128ms hang over period for the PSM entry
(the firmware will remain active for 128ms after sending the null func for
PSM and getting an ack for it.) This is a huge power consumption issue, and
appears unnecessary. So, configure the value to 1 ms.
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Janne Ylalehto <janne.ylalehto@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_cmd.c

@@ -515,7 +515,7 @@ int wl1271_cmd_ps_mode(struct wl1271 *wl, u8 ps_mode, bool send)
 	ps_params->ps_mode = ps_mode;
 	ps_params->send_null_data = send;
 	ps_params->retries = 5;
-	ps_params->hang_over_period = 128;
+	ps_params->hang_over_period = 1;
 	ps_params->null_data_rate = cpu_to_le32(1); /* 1 Mbps */
 
 	ret = wl1271_cmd_send(wl, CMD_SET_PS_MODE, ps_params,