Backport VIRPIL Controls device IDs to SDL2

Backport of SDL3 fix (libsdl-org/SDL#15418).

VIRPIL Controls (VID 0x3344) flight sticks are
misclassified as gamepads by SDL's axis-count
heuristic because they report exactly 6 axes,
matching SDL_GAMEPAD_AXIS_COUNT. Adding them to
the appropriate device lists ensures correct
classification.

Tested on Linux (Fedora 43, kernel 6.19) with:
- R-VPC Stick MT-50CM3 (PID 0x4391)
- L-VPC Stick MT-50CM3 (PID 0x8390)
- VPC VMAX Prime Throttle (PID 0x0196)