crc16: Create function for computing CRC 16

Add the simplest possible CRC 16 function that computes the CRC value
without the help of lookup tables.

Change-Id: I9163389adaa4a70c4e8ce8ce6d5f0661f40c7871
Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
4 files changed