HID: wacom: Add missing ABS_MISC event and feature declaration for 27QHD

27QHD has the same x_min/y_min (WACOM_CINTIQ_OFFSET) as other Cintiqs.

ABS_MISC event is required for PAD packet to work properly with
xf86-input-wacom.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>