SDL: Fixed trying to add a game controller mapping for the accelerometer on iOS

SDL Commits
1 
From 857e5b08c39cbd5a2a057669448e40a301b071b1 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Sun, 24 Dec 2023 11:19:16 -0800
Subject: [PATCH] Fixed trying to add a game controller mapping for the
 accelerometer on iOS

Fixes https://github.com/libsdl-org/SDL/issues/8716

(cherry picked from commit 0e5ea3cc4b98d061688a098836254ab6470b07e8)
---
 src/joystick/iphoneos/SDL_mfijoystick.m | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/joystick/iphoneos/SDL_mfijoystick.m b/src/joystick/iphoneos/SDL_mfijoystick.m
index 9a9a4defcc2b..ed38cf5b44a6 100644
--- a/src/joystick/iphoneos/SDL_mfijoystick.m
+++ b/src/joystick/iphoneos/SDL_mfijoystick.m
@@ -1834,6 +1834,9 @@ static SDL_bool IOS_JoystickGetGamepadMapping(int device_index, SDL_GamepadMappi
     if (device == NULL) {
         return SDL_FALSE;
     }
+    if (device->accelerometer) {
+        return SDL_FALSE;
+    }
 
     if (@available(macOS 10.16, iOS 14.0, tvOS 14.0, *)) {
         int axis = 0;