dsp-devicetree files are currently a part of a proprietary project
and there is a requirement to move them to an opensource project.
This change adds the required files to opensource project with
the compilation disabled until the files are merged.
Change-Id: I9838c13afbcadec7c5a18bab1ccf867e32070cea
Signed-off-by: Anirudh Raghavendra <quic_araghave@quicinc.com>
