wl1271: Use proper rates for PSM entry/exit null-funcs for 5GHz

A fixed 1 mbps rate was used for the PSM entry/exit null-func frames. Fix this
by using the basic rates instead.

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_cmd.c

@@ -518,7 +518,7 @@ int wl1271_cmd_ps_mode(struct wl1271 *wl, u8 ps_mode, bool send)
 	ps_params->send_null_data = send;
 	ps_params->retries = 5;
 	ps_params->hang_over_period = 1;
-	ps_params->null_data_rate = cpu_to_le32(1); /* 1 Mbps */
+	ps_params->null_data_rate = cpu_to_le32(wl->basic_rate_set);
 
 	ret = wl1271_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 			      sizeof(*ps_params), 0);