kevin: Change battery i2c frequency to 100 KHz
kevin: Change battery i2c frequency to 100 KHz

Battery does not support frequency higher than 100 KHz.

BUG=chrome-os-partner:51722
TEST=Verify `battery` on kevin shows battery stats.
BRANCH=None

Change-Id: Ia75e0ffec9344dfc432205acce0ad31ca6d3fb3e
Signed-off-by: Shawn Nematbakhsh <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/335374
Commit-Ready: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Tested-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Reviewed-by: Mary Ruthven <81380f3403fed74252e92df3ed012a1819ec6296@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec