volteer: Disable commands to create ROM space
volteer: Disable commands to create ROM space

BUG=None
BRANCH=None
TEST=buildall

Signed-off-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Change-Id: Ida7cdfcec94c7129f4d08a1693ac34dcd4aa4691
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3733420
Reviewed-by: Tim Wawrzynczak <86444811eee8c2cb29e29a251d7a069e64ccc665@chromium.org>

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