joystick: Add VIRPIL Controls flight stick and throttle device IDs. (#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) -> SDL_JOYSTICK_TYPE_FLIGHT_STICK
- L-VPC Stick MT-50CM3 (PID 0x8390) -> SDL_JOYSTICK_TYPE_FLIGHT_STICK
- VPC VMAX Prime Throttle (PID 0x0196) -> SDL_JOYSTICK_TYPE_THROTTLE

src/joystick/SDL_joystick.c

@@ -476,6 +476,8 @@ static Uint32 initial_flightstick_devices[] = {
     MAKE_VIDPID(0x10f5, 0x7084), // Turtle Beach VelocityOne
     MAKE_VIDPID(0x231d, 0x0126), // Gunfighter Mk.III 'Space Combat Edition' (right)
     MAKE_VIDPID(0x231d, 0x0127), // Gunfighter Mk.III 'Space Combat Edition' (left)
+    MAKE_VIDPID(0x3344, 0x4391), // VIRPIL Controls R-VPC Stick MT-50CM3
+    MAKE_VIDPID(0x3344, 0x8390), // VIRPIL Controls L-VPC Stick MT-50CM3
     MAKE_VIDPID(0x362c, 0x0001), // Yawman Arrow
 };
 static SDL_vidpid_list flightstick_devices = {
@@ -523,6 +525,7 @@ static Uint32 initial_throttle_devices[] = {
     MAKE_VIDPID(0x044f, 0x0404), // HOTAS Warthog Throttle
     MAKE_VIDPID(0x0738, 0xa221), // Saitek Pro Flight X-56 Rhino Throttle
     MAKE_VIDPID(0x10f5, 0x7085), // Turtle Beach VelocityOne Throttle
+    MAKE_VIDPID(0x3344, 0x0196), // VIRPIL Controls VPC VMAX Prime Throttle
 };
 static SDL_vidpid_list throttle_devices = {
     SDL_HINT_JOYSTICK_THROTTLE_DEVICES, 0, 0, NULL,