Fix coreboot-utils to build with latest llvm

cbfs-payload-linux.c:255:43: note: add parentheses around left
hand side expression to silence this warning

if ((hdr->protocol_version >= 0x200) && (!hdr->loadflags & 1)) {

BUG=chromium:665657
TEST=coreboot-utils builds

Change-Id: I8758e7d158ca32e87107797f2a33b9d9a0e4676f
Reviewed-on: https://chromium-review.googlesource.com/411335
Commit-Ready: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed