intel: avs: Add AudioDSP base firmware for SKL-based platforms Provide the base firmware for the skylake- and avs- drivers to utilize. This is an updated version of existing intel/dsp_fw_release.bin and intel/dsp_fw_kbl.bin. Leave links for backward compatibility but put the binaries into a dedicated folder so it is clear which driver makes use of them. Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>