Make IMD private structures definitions accessible by other units.
To test IMD API correctness there is a need to access its internal
structure. It is only possible when private implementation is visible
in testing scope.
Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: Iff87cc1990426bee6ac3cc1dfa6f85a787334976
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46216
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>