HID: bpf: add support for Huion Kamvas 13 (Gen 3) (model GS1333)

This assumes that the tablet has been switched into vendor mode (by
using huion-switcher[1], for example) and is sending events using
Huion's proprietary data format.

This has been tested using the PW600L pen, which does not have an
eraser.  There is no expectation that a pen with an eraser will work at
this time.

[1] https://github.com/whot/huion-switcher

Signed-off-by: Nicholas LaPointe <nicholaslapointe8@gmail.com>
Link: https://gitlab.freedesktop.org/libevdev/udev-hid-bpf/-/merge_requests/162
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Author: Benjamin Tissoires