Update ch(4) to use ISO C style function definitions to avoid confusing Coccinelle.
Update ch(4) to use ISO C style function definitions to avoid
confusing Coccinelle.

No binary change.
ok dlg@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars