hwdb: Apply Acer mappings to all Gateway and Packard Bell models

Gateway and Packard Bell both belong to Acer and need the same mappings.
This has been checked on several Gateway and Packard Bell models enabled
by Endless and confirmed by Acer Product Manager.

Signed-off-by: Chris Chiu <chiu@endlessm.com>
Signed-off-by: João Paulo Rechi Vita <jprvita@endlessm.com>