Certain platforms share a processor family but need to be differentiated
between them. DEY was using the variable DIGI_FAMILY as the SOM name
rather than the family. It becomes useful to have both (DIGI_SOM as the
more specific, and DIGI_FAMILY as the more generic).
This is the case, for example, of:
- ccmp1 (family)
- ccmp15 (SOM)
- ccmp13 (SOM)
- ccimx8m (family)
- ccimx8mm (SOM)
- ccimx8mn (SOM)
Both variables are used on the machine overrides.
Where DIGI_FAMILY was used, use now DIGI_SOM.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>