K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2018-03-29T00:55:11.808437Z
K 7
svn:log
V 440
stand: Add workaround for HP BIOS issues

hrs@ and kuriyama@ have found that on some HP BIOS, a system will fail to
boot immediately after installation with the claim that it can't work out
which disk they are booting from.

They tracked it down to a buffer overrun, and found that it could be
alleviated by doing a dummy read before-hand.

Submitted by:	kuriyama
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D14341

END