Check if an argument is given and if not print the usage. Check if all arguments are handled by getopt and if not print the usage. Change-Id: I40dbd2a51d018eb549e9b2fa4365b3e4f9355bff Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/27778 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Alexander Couzens <lynxis@fe80.eu> Reviewed-by: Evgeny Zinoviev <me@ch1p.com>