google/kahlee/grunt: Fix 2 device specific variables

* micbias_lvl -> micbias-lvl
* mic_amp_in_sel -> mic-amp-in-sel

BUG=b:71875600
TEST=Checked in kernel the values are set

Change-Id: Ife7e8cdd835cc256cd8265593a94df84a510cebb
Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Reviewed-on: https://review.coreboot.org/23603
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed