Now that all of the makefiles under the src tree have SPDX headers,
add that expectation to the license header lint tool by removing
the exception for Makefile.inc.
Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Iab9d3262621af09a1c625378ae2e61e8a736cdf8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76952
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
