x86: revert removing soc.h from atom soc

This was part of the mega hwmv2 commit. Looks like hpet drivers heavily
relies on soc.h. Reverting this for now while we look for a proper fix
and remove reliance on soc.h for drivers.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
6 files changed