device_get_flags(9) on FreeBSD

The text 094b0d3c68fa, as FreeBSD 4.3-RELEASE, FreeBSD 4.2-RELEASE, FreeBSD 4.1.1-RELEASE, FreeBSD 4.1-RELEASE, FreeBSD 4.0-RELEASE shipped it.

manipulate driver flags

device_get_flags(9) on FreeBSD now