The util mkregtable includes a copy of the kernel API for linked lists,
only a small subset of it is used. Delete the unused functions and macros.
Reviewed-by: NGuenter Roeck <groeck@chromium.org>
Signed-off-by: NMatthias Kaehlcke <mka@chromium.org>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>