Added support for the 6-button SEGA Mega Drive Control Pad for Nintendo Online

src/joystick/SDL_gamecontroller.c

@@ -555,7 +555,7 @@ static ControllerMapping_t *SDL_CreateMappingForHIDAPIController(SDL_JoystickGUI
             SDL_strlcat(mapping_string, "a:b0,b:b1,back:b4,dpdown:b12,dpleft:b13,dpright:b14,dpup:b11,guide:b5,leftshoulder:b9,leftstick:b7,lefttrigger:a4,leftx:a0,lefty:a1,rightshoulder:b10,righttrigger:a5,start:b6,x:b2,y:b3,misc1:b15,", sizeof(mapping_string));
             break;
         case k_eSwitchDeviceInfoControllerType_SEGA_Genesis:
-            SDL_strlcat(mapping_string, "a:b0,b:b1,dpdown:b12,dpleft:b13,dpright:b14,dpup:b11,guide:b5,rightshoulder:b10,righttrigger:a5,start:b6,misc1:b15,", sizeof(mapping_string));
+            SDL_strlcat(mapping_string, "a:b0,b:b1,dpdown:b12,dpleft:b13,dpright:b14,dpup:b11,guide:b5,leftshoulder:b9,rightshoulder:b10,righttrigger:a5,start:b6,x:b2,y:b3,misc1:b15,", sizeof(mapping_string));
             break;
         case k_eWiiExtensionControllerType_None:
             SDL_strlcat(mapping_string, "a:b0,b:b1,back:b4,dpdown:b12,dpleft:b13,dpright:b14,dpup:b11,guide:b5,start:b6,x:b2,y:b3,", sizeof(mapping_string));