ec: Fix the legacy version of zassert_ok
ec: Fix the legacy version of zassert_ok

Correct zassert_ok to assert that the cond is 0 or false.

BRANCH=None
BUG=b:243050723
TEST=console_edit test

Signed-off-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@google.com>
Change-Id: Ic788df6feb70e9b395924a85d2b690f29f99ceee
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3840661
Commit-Queue: Aaron Massey <79529a820df71f45023239a3663736629646cc34@google.com>
Reviewed-by: Aaron Massey <79529a820df71f45023239a3663736629646cc34@google.com>
Commit-Queue: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Auto-Submit: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Tested-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>

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