Previously they included sys/dev/cx/machdep.h, but the cx driver was
retired in r359178. These drivers haven't had real development for
a decade or more so there's no real benefit in sharing this file; just
copy it to the ce and cp subdirs.
The code is not operational right now so just comment away an obviously
useless assignment. Fix some typos while here.
Found with: coccinelle (da.cocci)
