Support SL/SR on Switch 2 controllers, but only in mini-controller mode

It doesn't really make sense to support these in combined mode since they're usually occluded.

src/joystick/hidapi/SDL_hidapi_switch2.c

@@ -772,8 +772,6 @@ static void HandleGameCubeState(Uint64 timestamp, SDL_Joystick *joystick, SDL_Dr
 
 static void HandleCombinedControllerStateL(Uint64 timestamp, SDL_Joystick *joystick, SDL_DriverSwitch2_Context *ctx, Uint8 *data, int size)
 {
-    // FIXME: When we find out what the SL and SR buttons are, map them to paddles
-
     if (data[6] != ctx->last_state[6]) {
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_BACK, ((data[6] & 0x01) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_LEFT_STICK, ((data[6] & 0x08) != 0));
@@ -827,8 +825,6 @@ static void HandleCombinedControllerStateL(Uint64 timestamp, SDL_Joystick *joyst
 
 static void HandleMiniControllerStateL(Uint64 timestamp, SDL_Joystick *joystick, SDL_DriverSwitch2_Context *ctx, Uint8 *data, int size)
 {
-    // FIXME: When we find out what the SL and SR buttons are, map them to shoulder buttons
-
     if (data[6] != ctx->last_state[6]) {
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_START, ((data[6] & 0x01) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_LEFT_STICK, ((data[6] & 0x08) != 0));
@@ -841,6 +837,8 @@ static void HandleMiniControllerStateL(Uint64 timestamp, SDL_Joystick *joystick,
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_NORTH, ((data[7] & 0x02) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SOUTH, ((data[7] & 0x04) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_EAST, ((data[7] & 0x08) != 0));
+        SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER, ((data[7] & 0x10) != 0));
+        SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_LEFT_SHOULDER, ((data[7] & 0x20) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SWITCH2_JOYCON_LEFT_PADDLE1, ((data[7] & 0x40) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SWITCH2_JOYCON_LEFT_PADDLE2, ((data[7] & 0x80) != 0));
     }
@@ -865,8 +863,6 @@ static void HandleMiniControllerStateL(Uint64 timestamp, SDL_Joystick *joystick,
 
 static void HandleCombinedControllerStateR(Uint64 timestamp, SDL_Joystick *joystick, SDL_DriverSwitch2_Context *ctx, Uint8 *data, int size)
 {
-    // FIXME: When we find out what the SL and SR buttons are, map them to paddles
-
     if (data[5] != ctx->last_state[5]) {
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_WEST, ((data[5] & 0x01) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_NORTH, ((data[5] & 0x02) != 0));
@@ -909,13 +905,13 @@ static void HandleCombinedControllerStateR(Uint64 timestamp, SDL_Joystick *joyst
 
 static void HandleMiniControllerStateR(Uint64 timestamp, SDL_Joystick *joystick, SDL_DriverSwitch2_Context *ctx, Uint8 *data, int size)
 {
-    // FIXME: When we find out what the SL and SR buttons are, map them to shoulder buttons
-
     if (data[5] != ctx->last_state[5]) {
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_WEST, ((data[5] & 0x01) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_NORTH, ((data[5] & 0x02) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SOUTH, ((data[5] & 0x04) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_EAST, ((data[5] & 0x08) != 0));
+        SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER, ((data[5] & 0x10) != 0));
+        SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_LEFT_SHOULDER, ((data[5] & 0x20) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SWITCH2_JOYCON_RIGHT_PADDLE1, ((data[5] & 0x40) != 0));
         SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SWITCH2_JOYCON_RIGHT_PADDLE2, ((data[5] & 0x80) != 0));
     }