staging: wfx: simplify hif_mib_set_data_filtering

The field "default_filter" was not obvious.

In add, explicitly declare that fields default_filter and enable are
booleans.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200115135338.14374-34-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/hif_api_mib.h

@@ -206,9 +206,11 @@ struct hif_mib_config_data_filter {
 } __packed;
 
 struct hif_mib_set_data_filtering {
-	u8    default_filter;
-	u8    enable;
-	u8    reserved[2];
+	u8    invert_matching:1;
+	u8    reserved1:7;
+	u8    enable:1;
+	u8    reserved2:7;
+	u8    reserved3[2];
 } __packed;
 
 enum hif_arp_ns_frame_treatment {

drivers/staging/wfx/sta.c

@@ -154,9 +154,8 @@ static int wfx_set_mcast_filter(struct wfx_vif *wvif,
 	if (ret)
 		return ret;
 
-	// discard all data frames except match filter
 	filter_data.enable = 1;
-	filter_data.default_filter = 1; // discard all
+	filter_data.invert_matching = 1; // discard all but matching frames
 	ret = hif_set_data_filtering(wvif, &filter_data);
 
 	return ret;