intel_adsp: add the board definition for the Meteorlake

Board definition for the meteorlake platform.
Enable intel_adsp_ace15_mtpm in the sof sample.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Co-authored-by: Michal Wasko <michal.wasko@intel.com>
Co-authored-by: Konrad Leszczynski <konrad.leszczynski@intel.com>