Guard multiple options depending on another with an if-block. It's not
needed to repeat the condition for every option.
This also cleans up the ordering of the options and groups all options
related to iPXE.
Change-Id: I9e74ab567f619a2d5c20c6c0282b37193d9ac01b
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78925
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
596c6f3a2e