volteer: enable CONFIG_BRINGUP
volteer: enable CONFIG_BRINGUP

Prevent EC from powering up AP during initial board bringup.

BUG=none
BRANCH=none
TEST=make buildall -j

Change-Id: Id0ec787ed34444a9e40174925d8c11a8e71d66d0
Signed-off-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1850276
Reviewed-by: Abe Levkoy <2e1ad7039298f93262cf06bbb457275fb3e2ecb5@chromium.org>
Reviewed-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>

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