ieee802154: move headers out of extra directory

include/net/ieee802154/af_ieee802154.h (and others) naming seems to be too long
and redundant. Drop one level of subdirectories.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
diff --git a/drivers/ieee802154/fakehard.c b/drivers/ieee802154/fakehard.c
index 9ec07e8..8a52e6e 100644
--- a/drivers/ieee802154/fakehard.c
+++ b/drivers/ieee802154/fakehard.c
@@ -26,10 +26,10 @@
 #include <linux/skbuff.h>
 #include <linux/if_arp.h>
 
-#include <net/ieee802154/af_ieee802154.h>
-#include <net/ieee802154/netdevice.h>
-#include <net/ieee802154/mac_def.h>
-#include <net/ieee802154/nl802154.h>
+#include <net/af_ieee802154.h>
+#include <net/ieee802154_netdev.h>
+#include <net/ieee802154.h>
+#include <net/nl802154.h>
 
 /**
  * fake_get_pan_id - Retrieve the PAN ID of the device.