kern/163974: Via RNG not enabled on amd64

[jkim at FreeBSD.org]

Synopsis: Via RNG not enabled on amd64

Responsible-Changed-From-To: freebsd-bugs->jkim
Responsible-Changed-By: jkim
Responsible-Changed-When: Mon Jan 9 22:21:03 UTC 2012
Responsible-Changed-Why: 
I can take it but I cannot test it because I do not have a VIA Nano processor
platform any more.  I'll just assume the originator tested it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=163974