memtest86+: Fix build warnings

With increased error checking, the memset() call complains about dropping
the volatile and there are multiple outsb() functions defined.

Change-Id: Id626e533737d5aa4b5227ab341177efb15473499
Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Reviewed-on: https://review.coreboot.org/13909
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2 files changed