According to chapter 14 of the NFC-DEP Digital
Protocol Spec., the NAD byte should never be
present in DEP_REQ or DEP_RES frames.  However,
this is not enforced so add that enforcement code.
Reviewed-by: NThierry Escande <thierry.escande@linux.intel.com>
Tested-by: NThierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: NMark A. Greer <mgreer@animalcreek.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>