brcmfmac: Fix bug mgmt_rx_register

Mask is OR-ed with value in case of deregister. Should
be AND-ed.
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John 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);
 }