puff: Change default VCCST_PG_OD to low.
puff: Change default VCCST_PG_OD to low.

The EDS expects VCCST_PWRGD to remain low until VCCST and VDDQ are
stable and within specification. From a fresh EC boot, this seems
unlikely so default to low.

BRANCH=none
BUG=b:148042540
TEST=make buildall; puff cold boot succeeds consistently on a dut where
     it previously failed consistently

Change-Id: I827714f5c4d563a205941ee2d3b2d5c781439cdb
Signed-off-by: Sam McNally <fa45cad00d68e10cba722214c28ca2497355b0cc@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2024252
Commit-Queue: Peter Marheine <ef0b2c492edde94778d7465bfbaeed52c5be6858@chromium.org>
Reviewed-by: Peter Marheine <ef0b2c492edde94778d7465bfbaeed52c5be6858@chromium.org>
Tested-by: Peter Marheine <ef0b2c492edde94778d7465bfbaeed52c5be6858@chromium.org>

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