nissa: enable PD_REQUIRE_AP_MODE_ENTRY
nissa: enable PD_REQUIRE_AP_MODE_ENTRY

This corrects some behavior around docking stations and mode entry
when the AP is powered off.

BUG=b:258143457
TEST=display still works with Startech DK30C2DAGPD dock
BRANCH=nissa

Signed-off-by: Peter Marheine <ef0b2c492edde94778d7465bfbaeed52c5be6858@chromium.org>
Change-Id: Idbd56fc0a0c44def2226b26530ffcd87a719311b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4050000
Code-Coverage: Zoss <345cf107e82c70959d46f59d98bddc98ce458aff@prod.google.com>
Reviewed-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@google.com>

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