Move usage function closer to main(), remove excessive printf() calls, use descriptive argument flags. Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Change-Id: If5252de63692c5e43bfbde4d7d93e1d7a84e8dff Reviewed-on: https://review.coreboot.org/c/coreboot/+/70524 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Elyes Haouas <ehaouas@noos.fr>