platform/surface: aggregator_registry: Add support for Surface Pro 7+

The Surface Pro 7+ is essentially a refresh of the Surface Pro 7 with
updated hardware and a new WSID identifier.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20210309162550.302161-1-luzmaximilian@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>