Bootrom: Suppress debug output on _PRODUCTION builds
Bootrom: Suppress debug output on _PRODUCTION builds

The code change to actually use the _PRODUCTION define fell through the
cracks. Added it in.

Testing Done: compiled a _PRODUCTION version and verified it had no debug spew.
Bug Number: trivial
Review URL:
Reviewed by:

Signed-off-by:  Morgan Girling <980e61e2e2b82c453db57c2e8646c01fbd3318cd@bsquare.com>

projectara/bootrom,gregkh/bootrom