Doh.. __IPHONEOS__ is defined on tvOS

include/SDL_config_iphoneos.h

@@ -139,11 +139,11 @@
 #define SDL_JOYSTICK_MFI 1
 #define SDL_JOYSTICK_HIDAPI 1
 
-#ifdef __IPHONEOS__
+#ifdef __TVOS__
+#define SDL_SENSOR_DUMMY    1
+#else
 /* Enable the CoreMotion sensor driver */
 #define SDL_SENSOR_COREMOTION   1
-#else
-#define SDL_SENSOR_DUMMY    1
 #endif
 
 /* Enable Unix style SO loading */