Strict value checking will cause problem.
Bay trail DN2820FYKH is supported on Linux but does not work on FreeBSD.
This behaviour is bug-compatible with Linux-3.13.5.

References:
http://d.hatena.ne.jp/syuu1228/20140326
http://lxr.linux.no/linux+v3.13.5/arch/x86/kernel/acpi/boot.c#L1094

Submitted by: syuu

git-svn-id: svn+ssh://svn.freebsd.org/base/head@263795 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
(cherry picked from commit 638fe96273c1d3fd95e89bacf027dde162d8ba47)

Ticket: #4996