udev: consider a device with BTN_TRIGGER_HAPPY as joystick

udev: consider a device with BTN_TRIGGER_HAPPY as joystick

These buttons were added specifically for joysticks with lots of buttons, no
other device should be using them. See kernel commit
cf2f765f18960 "HID: handle joysticks with large number of buttons"

We only test for BTN_TRIGGER_HAPPY (an alias for BTN_TRIGGER_HAPPY1) here, a
device that sets buttons 2 and above but doesn't set 1 is considered buggy.

https://github.com/systemd/systemd/issues/6137

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>