Input: silead - add Chuwi Hi8 support

This commit add ACPI support for Chuwi Hi8 tablet. On the ACPI table of
the tablet, GSL1680 is registered as MSSL0001, so the driver does not
recognize the device. This commit resolve it.

Signed-off-by: Shohei Maruyama <cheat.sc.linux@outlook.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>