SDLInput:Source Add a message prompt for gamepads witn non-Xbox layouts

pcsx2/Input/SDLInputSource.cpp

@@ -690,7 +690,14 @@ std::optional<InputBindingKey> SDLInputSource::ParseKeyString(const std::string_
 						const SDL_GamepadButtonLabel label = SDL_GetGamepadButtonLabel(it->gamepad, face_button_pos[pos]);
 						if (key.data == (label - 1))
 						{
-							key.data = pos;
+							if (key.data != pos)
+							{
+								Host::ReportInfoAsync(TRANSLATE("SDLInputSource", "SDL3 Migration"),
+									TRANSLATE("SDLInputSource", "As part of our upgrade to SDL3, we've had to migrate your binds\n"
+																"Your controller did not match the Xbox layout and may need rebinding\n"
+																"Please verify your controller settings and amend if required"));
+								key.data = pos;
+							}
 							break;
 						}
 					}