atmega_common: add ENOTSUP to errno.h
[SQUASH ME] tests.netdev: Fix warnings for msp430
[SQUASH ME] cc2420: Fix warnings for msp430
[SQUASH ME] unittests: Fix warnings for non-32-bit boards
Merge branch 'net-dev-base' into network-layer-interface
[SQUASH ME] cc2420: remove transceiver dependency
Merge branch 'net-dev-base' into network-layer-interface
Merge branch 'network-layer-interface' into uart_net