v4l2_codec2: Remove multilib support

For the bindarized HAL, multilib doesn't make any sense.
Also, it confuses the init sometimes if both 64 and 32
variants are available on the board.

Change-Id: I33854241f2976ac54cdb7731cdcc93e94021d30c
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Link: https://android-review.googlesource.com/c/platform/external/v4l2_codec2/+/2780997


Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>