nyan: Decrease ec_boot_to_console override further

300ms was a bit too conservative, it seems. The EC's "Console
is enabled" message shows up at around 120ms, but the AP begins
vboot init at around 324ms. So commands like "reboot ap-off" need
to be entered even sooner to avoid contending with vboot.

BUG=chrome-os-partner:29200
TEST=firmware_RecoveryButton succeeds more reliably on Nyan

Change-Id: Ie973f034023d22f0300c3d12154b1577ec65c6e1
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/201720
Reviewed-by: Vic Yang <victoryang@chromium.org>
1 file changed