Remove coreboot 4.8.1, 4.13, and 4.17, which were all unused.
Remove extra copies of EXTRA_FLAGS which duplicated the common
definition. The only difference was
-Wno-error=address-of-packed-member, the warning is now disabled
entirely everywhere with -Wno-address-of-packed-member.
Use separate coreboot_version values for talos_2, nitrokey, and purism,
which gives each a separate build directory.
Move conditional blob definitions out of each coreboot version.
Fix condition for coreboot-blobs - whether a module is a git clone
actually depends on non-empty <module>_repo, not <module>_version==git.
Fix the test so git versions of coreboot can have arbitrary names.
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
fb6b81119d