MFC: r365009
r365009 | imp | 2020-08-31 15:04:00 -0600 (Mon, 31 Aug 2020) | 10 lines

Add deprecation notice for apm BIOS

Add deprecation notice for apm bios, aka the apm(4) device. The apm(8)
command will remain, at least for a while, since ACPI emulates the apm
ioctl interface.

Discussed on: arch@
Relnotes: yes
MFC After: 3 days