linux-firmware: intel: Update Skylake audio firmware

This updates Skylake audio dsp firmware to latest version. The version
of this firmware release is 9.21.00.3402_161.

The md5sum of this firmware binary is b4bcca9172c1e319eb87d951efe25c48.
Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com>

WHENCE

@@ -3278,7 +3278,9 @@ Driver: snd-soc-skl
 
 File: intel/dsp_fw_release_v969.bin
 Version: 8.20.00.969
-Link: intel/dsp_fw_release.bin -> intel/dsp_fw_release_v969.bin
+File: intel/dsp_fw_release_v3402.bin
+Version: 9.21.00.3402_161
+Link: intel/dsp_fw_release.bin -> intel/dsp_fw_release_v3402.bin
 
 License: Redistributable. See LICENCE.adsp_sst for details
 

intel/dsp_fw_release.bin

-dsp_fw_release_v969.bin
\ No newline at end of file
+dsp_fw_release_v3402.bin
\ No newline at end of file