This updates Kabylake audio dsp firmware to latest version.

The version of this firmware release is 9.21.00.2042_46

The md5sum of this firmware binary is 411e2b3b528f0eec194304feb7dee4ae
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>