mainboard/google/fizz: Tune audio i2c parameters

Tune I2C params for I2C bus 5 to ensure that the frequency does not
exceed 400KHz.

BUG=b:65058277
BRANCH=None
TEST=Measured bus frequency for audio <= 400MHz

Change-Id: I18bca023a6a0fe21e6f46f8688264d3c04d77f25
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://review.coreboot.org/23359
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed