brcmfmac: Fix bug mgmt_rx_register

Mask is OR-ed with value in case of deregister. Should
be AND-ed.
Reviewed-by: NArend Van Spriel <arend@broadcom.com>
Reviewed-by: NPieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: NHante Meuleman <meuleman@broadcom.com>
Signed-off-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c

@@ -3742,7 +3742,7 @@ brcmf_cfg80211_mgmt_frame_register(struct wiphy *wiphy,
 	if (reg)
 		vif->mgmt_rx_reg |= BIT(mgmt_type);
 	else
-		vif->mgmt_rx_reg |= ~BIT(mgmt_type);
+		vif->mgmt_rx_reg &= ~BIT(mgmt_type);
 }