staging: wfx: drop useless function

Since the code for multicast filtering has been dropped, the function
hif_set_data_filtering() is only called to disable multicast filtering.
In fact, the multicast filtering is already disabled by default. So,
this function is useless and can be dropped.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200907101521.66082-8-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/hif_api_mib.h

@@ -82,14 +82,6 @@ struct hif_mib_gl_set_multi_msg {
 	u8     reserved2[3];
 } __packed;
 
-struct hif_mib_set_data_filtering {
-	u8     invert_matching:1;
-	u8     reserved1:7;
-	u8     enable:1;
-	u8     reserved2:7;
-	u8     reserved3[2];
-} __packed;
-
 enum hif_arp_ns_frame_treatment {
 	HIF_ARP_NS_FILTERING_DISABLE = 0x0,
 	HIF_ARP_NS_FILTERING_ENABLE  = 0x1,

drivers/staging/wfx/hif_tx_mib.c

@@ -228,17 +228,6 @@ int hif_set_tx_rate_retry_policy(struct wfx_vif *wvif,
 	return ret;
 }
 
-int hif_set_data_filtering(struct wfx_vif *wvif, bool enable, bool invert)
-{
-	struct hif_mib_set_data_filtering val = {
-		.enable = enable,
-		.invert_matching = invert,
-	};
-
-	return hif_write_mib(wvif->wdev, wvif->id,
-			     HIF_MIB_ID_SET_DATA_FILTERING, &val, sizeof(val));
-}
-
 int hif_keep_alive_period(struct wfx_vif *wvif, int period)
 {
 	struct hif_mib_keep_alive_period arg = {

drivers/staging/wfx/hif_tx_mib.h

@@ -37,7 +37,6 @@ int hif_set_association_mode(struct wfx_vif *wvif, int ampdu_density,
 			     bool greenfield, bool short_preamble);
 int hif_set_tx_rate_retry_policy(struct wfx_vif *wvif,
 				 int policy_index, u8 *rates);
-int hif_set_data_filtering(struct wfx_vif *wvif, bool enable, bool invert);
 int hif_keep_alive_period(struct wfx_vif *wvif, int period);
 int hif_set_arp_ipv4_filter(struct wfx_vif *wvif, int idx, __be32 *addr);
 int hif_use_multi_tx_conf(struct wfx_dev *wdev, bool enable);

drivers/staging/wfx/sta.c

@@ -120,8 +120,6 @@ void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
 			filter_beacon = true;
 		wfx_filter_beacon(wvif, filter_beacon);
 
-		hif_set_data_filtering(wvif, false, true);
-
 		if (*total_flags & FIF_OTHER_BSS)
 			filter_bssid = false;
 		else