HID: bpf: Add support for the XP-PEN Deco Mini 4

The XP-PEN Deco Mini 4 is a UGEE device with a frame with 6 buttons.
Its pen has 2 buttons and supports pressure reporting.

Fix their report descriptors and transform the frame button events to
support it.

Link: https://gitlab.freedesktop.org/libevdev/udev-hid-bpf/-/merge_requests/88


Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://patch.msgid.link/20240627-import-bpf-v1-4-0dbcda4a5b1f@kernel.org


Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>