We prefer the default AT&T dialect on x86
Change-Id: I7a5778c82ab5df6e971dfc73e98373893cfeeb92
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/13135
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)