clang wont compile `cmp` asm opcode because it's ambiguous, use the correct op suffix `cmpl` Change-Id: I82da5a9065b382e182dc7d502c7dca2fc717543b Signed-off-by: Damien Zammit <damien@zamaudio.com> Reviewed-on: https://review.coreboot.org/21359 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>