Instead of calling process_hid_report.

This adds a reference count on unix devices to make sure they are kept
alive until all their input report events have been processed.

This also uses a bus-specific device list, to be able to find devices
from joystick ids without having to call back to the win32 side.
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>