poppy: Increase base debounce time to 20ms
poppy: Increase base debounce time to 20ms

From our testing, 5ms seems a little short: 20ms is probably better.

BRANCH=none
BUG=b:62393957
BUG=b:35586668
TEST=Test that base is always detected.

Change-Id: I8d0041fc387568cfa0983584ca1d68711c70d9cf
Reviewed-on: https://chromium-review.googlesource.com/535214
Commit-Ready: Nicolas Boichat <f3daba1cdc403799935674d3cd4b0e5bd1804232@chromium.org>
Tested-by: Nicolas Boichat <f3daba1cdc403799935674d3cd4b0e5bd1804232@chromium.org>
Reviewed-by: Furquan Shaikh <6be5c96c464778f89679b1062a2e0a6af93d2aa5@chromium.org>

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