Yaboot relies on the read function from openbios to stop reading at the
end of a file. This patch makes sure to not read beyond the end of the
file. This fixes the boot of debian-installer using a CD-ROM.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://coreboot.org/openbios/openbios-devel@373 f158a5a8-5612-0410-a976-696ce0be7e32