Oak: Free up flash space
Oak: Free up flash space

Oak is down to less than 100 bytes of free flash on ToT.  Enable brief
debug asserts to bring it up to about 1.5k free.

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

Signed-off-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Change-Id: I7e005741d3fbf7f5c1b3dc4b09359572aad7c325
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3072869
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Commit-Queue: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

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