Separate setup for different low level bearer. By default the
Makefile will create version suitable for qemu testing using
slip. If one writes "make NET_IFACE=802154" then IEEE 802.15.4
radio specific settings are activated.
Because echo-server does not contain any processor specific
settings, remove the ARM config files and rename the x86
specific ones.
Change-Id: I2caf26979f32496c6efb4dd1f625a60e3e5f6744
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>