x86/car: Replace reference of copy_and_run location

For cases with POSTCAR_STAGE=y this reference pulled
in the implementation of run_ramstage() which we would
not call.

Using _program results with the same region being marked
as WRPROT-cacheble.

Change-Id: Ie1eaf6f5bb8baa13e946112c4fc3d854dbf750a3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/27232
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Keith Hui <buurin@gmail.com>
6 files changed