Lower I2C frequency to meet spec

For I2C bus connected to PCH, clock frequency must not exceed 100KHz.
Lower temp sensor I2C bus to meet PCH spec.

BUG=chrome-os-partner:9928
TEST=Still able to read I2C temperature sensors.

Change-Id: Idec66d9124f61dc12e763561e0364c9ddb9ffeb0
Reviewed-on: https://gerrit.chromium.org/gerrit/26884
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Vic Yang <victoryang@chromium.org>
Tested-by: Vic Yang <victoryang@chromium.org>
1 file changed