Fix on MAC setting in NVS file

Many HW platform will not allow accessing unsigned int values in odd addresses, so you should pass to a sscanf with %x format a pointer to a unsigned int value.
Bug detected on a Samsung's S3C2416 based platform.

Signed-off-by: José Miguel Gonçalves <jose.goncalves@inov.pt>
Merge branch 'master' of https://github.com/JoseGoncalves/ti-utils