intel_adsp: ace20_lnl: add soc definitions for LNL platform.

LNL platform is ACE 2.0 series with changes in shim registers and HW
features. Initial definition replicates MTL as much as possible, however
it will vary after enabling LNL platform.

Signed-off-by: Jaroslaw Stelter <Jaroslaw.Stelter@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>