mancomb: Configure power sense voltage divider
mancomb: Configure power sense voltage divider

Power voltage SNS_PPVAR_PWR_IN is a 5/39 voltage divider.

BUG=b:188538949
TEST=adc POWER_V
 POWER_V = 20463 mV
BRANCH=None

Signed-off-by: Rob Barnes <3ced0940a2329ce70499686f01d3d60685ec66ed@google.com>
Change-Id: Ic7c83241854a4a55c3db64d5e6220baea47d0b27
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2903907
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Commit-Queue: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>

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