linux-firmware: Update Skylake audio firmware

This updates Skylake audio dsp firmware, this version contains
odd bug fixes and support for mclk configuration thru SW

The version of this firmware release is 8.20.00.827

The md5sum of this firmware binary is 2a2166e169098c8620cb15ea0f850ed9
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

WHENCE

@@ -2905,8 +2905,8 @@ License: Redistributable. See LICENCE.fw_sst_0f28 for details
 Driver: snd-soc-skl
 
 File: intel/dsp_fw_release.bin
-Version: 8.20.00.669
-md5sum: 039c718077ea3c3a4253110a0554f422
+Version: 8.20.00.827
+md5sum: 2a2166e169098c8620cb15ea0f850ed9
 
 License: Redistributable. See LICENCE.adsp_sst for details