net: ieee802154: adf7242: Add support for ADF7241 devices

This adds support for ADF7241 Low Power IEEE 802.15.4
Zero-IF 2.4 GHz Transceivers

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>

ieee802154/adf7242: Driver for ADF7242 MAC IEEE802154

This driver has been sitting in the linux-zigbee[2] repository for a long
time. We updated it from time to time and made it available via our
github kernel repository. The Linux MAC802.15.4 support has improved a lot
since then. Thanks to all! So it’s finally time to upstream this driver.

The ADF7242 requires an add-on firmware for the automatic IEEE 802.15.4
operating modes. The firmware file is currently made available on the
ADF7242 wiki page here [1]

[1] http://wiki.analog.com/resources/tools-software/linux-drivers/networking-mac802154/adf7242
[2] http://sourceforge.net/p/linux-zigbee/kernel/ci/devel/tree/drivers/ieee802154/adf7242.c

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>