Revert "isa: Use gone_in_dev(9) for deprecation message"

gone_in(_dev) prints only one message per function call src line, so
this would miss reporting for the second and later such devices.

This reverts commit ce6792d3cd798079f0c9ba244faba4ea666bb6f4.

Reported by: glebius
Sponsored by: The FreeBSD Foundation