mac802154: introduce mac802154_config_ops

This patch introduces mac802154_config_ops struct. Like wireless this
struct should be the only one interface between ieee802154 to mac802154
or possible HardMAC drivers.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/mac802154/Makefile b/net/mac802154/Makefile
index 2e497d0..702d8b4 100644
--- a/net/mac802154/Makefile
+++ b/net/mac802154/Makefile
@@ -1,5 +1,5 @@
 obj-$(CONFIG_MAC802154)	+= mac802154.o
 mac802154-objs		:= main.o rx.o tx.o mac_cmd.o mib.o \
-			   iface.o llsec.o util.o
+			   iface.o llsec.o util.o cfg.o
 
 ccflags-y += -D__CHECK_ENDIAN__