ieee802154: add simple HardMAC driver sample

fakehard is a really simple driver implementing only necessary
callbacks and serves the role of an example of driver for HardMAC
IEEE 802.15.4 device.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Sergey Lapin <slapin@ossfans.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/Makefile b/drivers/Makefile
index 1266ead..9e7d4e5 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -107,3 +107,4 @@
 obj-$(CONFIG_VIRTIO)		+= virtio/
 obj-$(CONFIG_STAGING)		+= staging/
 obj-y				+= platform/
+obj-y				+= ieee802154/