Add configurations for hbd identity transform

This adds the proper cfgs to av1_{inv/fwd}_txfm1d_cfg for
the identity transform so all hbd transforms can use
the same codepath. This has no impact on performance
since the new identity transforms that correspond with
the cfgs are not yet being called. Once this is checked in,
we should be able to delete all deprecated transform functions
and have a single code flow for all hbd transforms.


Change-Id: I3d1bfbc8bc29b367e8ddf7dcd27525af0bd31067
11 files changed