drivers: cc2520: Add a new IP stack ready adaptation of CC2520 driver

It's basically a copy/paste of original driver,
using native IP stack API.

This is meant to avoid cluttering the original driver
code with #ifdef, and in future it will help removing
the old driver as well.

Change-Id: I67d974ad7440d258583a5c7c6c7160e99210808c
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
8 files changed