google/chell: Update DPTF configuration

Update the DPTF configuration for the chell mainboard:

1) Enable DPTF charger control, set max current to 1975mA
according to the battery specification.
2) Enable charger effect on charger temp sensor in TRT
3) Set PL2 to 15W which is the same value configured in the CPU.

BUG=chrome-os-partner:49859,chrome-os-partner:50306
BRANCH=glados
TEST=build and boot on chell

Change-Id: Icff5edc9d659bea6370ff8de1334ebf0983340da
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/329187
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed