mac80211: remove support for IFF_PROMISC

This support is essentially useless as typically networks are encrypted,
frames will be filtered by hardware, and rate scaling will be done with
the intended recipient in mind. For real monitoring of the network, the
monitor mode support should be used instead.

Removing it removes a lot of corner cases.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/b43/main.c

@@ -3131,8 +3131,6 @@ static void b43_adjust_opmode(struct b43_wldev *dev)
 		ctl |= B43_MACCTL_KEEP_BAD;
 	if (wl->filter_flags & FIF_PLCPFAIL)
 		ctl |= B43_MACCTL_KEEP_BADPLCP;
-	if (wl->filter_flags & FIF_PROMISC_IN_BSS)
-		ctl |= B43_MACCTL_PROMISC;
 	if (wl->filter_flags & FIF_BCN_PRBRESP_PROMISC)
 		ctl |= B43_MACCTL_BEACPROMISC;
 
@@ -4310,16 +4308,14 @@ static void b43_op_configure_filter(struct ieee80211_hw *hw,
 		goto out_unlock;
 	}
 
-	*fflags &= FIF_PROMISC_IN_BSS |
-		  FIF_ALLMULTI |
+	*fflags &= FIF_ALLMULTI |
 		  FIF_FCSFAIL |
 		  FIF_PLCPFAIL |
 		  FIF_CONTROL |
 		  FIF_OTHER_BSS |
 		  FIF_BCN_PRBRESP_PROMISC;
 
-	changed &= FIF_PROMISC_IN_BSS |
-		   FIF_ALLMULTI |
+	changed &= FIF_ALLMULTI |
 		   FIF_FCSFAIL |
 		   FIF_PLCPFAIL |
 		   FIF_CONTROL |