rt2x00: never disable multicast because it disables broadcast too

On rt73 and rt61 disabling reception of multicast packets also disables
broadcast traffic which we never want to do. Therefore we should never
disable multicast.
Signed-off-by: Adam Baker <linux@baker-net.org.uk>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt61pci.c

@@ -2302,8 +2302,8 @@ static void rt61pci_configure_filter(struct ieee80211_hw *hw,
 	 * Apply some rules to the filters:
 	 * - Some filters imply different filters to be set.
 	 * - Some things we can't filter out at all.
+	 * - Multicast filter seems to kill broadcast traffic so never use it.
 	 */
-	if (mc_count)
 	*total_flags |= FIF_ALLMULTI;
 	if (*total_flags & FIF_OTHER_BSS ||
 	    *total_flags & FIF_PROMISC_IN_BSS)

drivers/net/wireless/rt2x00/rt73usb.c

@@ -1869,8 +1869,8 @@ static void rt73usb_configure_filter(struct ieee80211_hw *hw,
 	 * Apply some rules to the filters:
 	 * - Some filters imply different filters to be set.
 	 * - Some things we can't filter out at all.
+	 * - Multicast filter seems to kill broadcast traffic so never use it.
 	 */
-	if (mc_count)
 	*total_flags |= FIF_ALLMULTI;
 	if (*total_flags & FIF_OTHER_BSS ||
 	    *total_flags & FIF_PROMISC_IN_BSS)