include: direct_eq.h not direct_eq_domain.h

The direct file name for fi_eq.h should be fi_direct_eq.h,
not fi_direct_eq_domain.h

Signed-off-by: Sayantan Sur <sayantan.sur@intel.com>
Merge pull request #125 from sayantansur/direct-eq2

include: direct_eq.h not direct_eq_domain.h