scarlet: Enable software-controlled input current limit
scarlet: Enable software-controlled input current limit

By default the input current on Scarlet is limited to 500mA,
which is defined by ILIM pin.
We need to disable the control from ILIM pin to draw more
current from the source.

BUG=b:64821815
BRANCH=none
TEST=manually monitor the charging current

Change-Id: Ia356a2397b3671c178479a581b44a17215fee83d
Signed-off-by: Philip Chen <3ee404f9ef892bc3fda6e6a76e65843b5fa44db2@google.com>
Reviewed-on: https://chromium-review.googlesource.com/639918
Commit-Ready: Philip Chen <3ee404f9ef892bc3fda6e6a76e65843b5fa44db2@chromium.org>
Tested-by: Philip Chen <3ee404f9ef892bc3fda6e6a76e65843b5fa44db2@chromium.org>
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

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