mac80211: fix kernel crash on netdev unregister on newer 3.14 kernels

Based on patch by Mark Milburn

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 43224

package/kernel/mac80211/patches/008-fix_netdev_unregister.patch

 --- a/net/mac80211/iface.c
 +++ b/net/mac80211/iface.c
-@@ -1859,6 +1859,11 @@ void ieee80211_remove_interfaces(struct 
+@@ -1859,6 +1859,13 @@ void ieee80211_remove_interfaces(struct 
  	}
  	mutex_unlock(&local->iflist_mtx);
  	unregister_netdevice_many(&unreg_list);
 +#if (!(LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,45) && \
 +       LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)) && \
++     !(LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,9) && \
++       LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0)) && \
 +     (LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)))
 +	list_del(&unreg_list);
 +#endif