drobit: Limit the input current setting
drobit: Limit the input current setting

Limit the input current to 98% negotiated limit,
to account for the charger chip margin.

BUG=b:183467915
BRANCH=firmware-volteer-13672.B
TEST=make BOARD=drobit
Use "ectool chargstate show" to check input current.

Signed-off-by: Jacky Wang <7c734db1d91dd6473466dda22f3cd45577127441@pegatron.corp-partner.google.com>
Change-Id: I4cff9c69b39f84616e535958e2bde1a64fd040ec
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2781097
Reviewed-by: Michael5 Chen <efae8ab77494afb7fe65de1b400810ea0ad38b43@pegatron.corp-partner.google.com>
Reviewed-by: Zhuohao Lee <916bf7ddbf0565669e59e3cb2b613381a48066c0@chromium.org>

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