kevin / gru: Wait to allow ADC 'version' cap to sufficiently charge
kevin / gru: Wait to allow ADC 'version' cap to sufficiently charge

Allow at least 10ms for the 'version' cap to charge in order to have a
voltage on the ADC pin that reflects our voltage divider circuit.

BUG=chrome-os-partner:54768
BRANCH=None
TEST=Manual on kevin. Run 'ver', verify that rev3 board is recognized as
version 3.

Change-Id: I1f3326f4c99a165d77363834d5671aa357a89007
Signed-off-by: Shawn Nematbakhsh <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/357970
Commit-Ready: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Tested-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Reviewed-by: Philip Chen <3ee404f9ef892bc3fda6e6a76e65843b5fa44db2@chromium.org>

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