HID: uclogic: add proper support for PF1209

This removes extra event device and fixes reported button codes of UC-Logic
Tablet PF1209.

This tablet is also sold as Genius PenSketch 12x9 (or 9x12) and possibly
under other names.

Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>