kohaku : change battery discharging max temperature
kohaku : change battery discharging max temperature

Change battery discharging max temperature from 60 to 70.

BUG=b:143910072
BRANCH=master
TEST=flash EC and check battery charging.

Change-Id: Ia5a6a7c565e96e880715c6a03727c51a70dcab7c
Signed-off-by: YongBeum.Ha <0375183cfb575c7cdd5cfe73f9fcd260a8810df7@samsung.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1806175
Reviewed-by: Tim Wawrzynczak <86444811eee8c2cb29e29a251d7a069e64ccc665@chromium.org>

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