Be clear that disabling Vulkan surface support disables the entire SDL Vulkan integration

include/SDL_config_windows.h

@@ -208,7 +208,8 @@ typedef unsigned int uintptr_t;
 #define SDL_VIDEO_OPENGL_EGL    1
 #endif
 
-#define SDL_VIDEO_VULKAN_SURFACE 1
+/* Enable Vulkan support */
+#define SDL_VIDEO_VULKAN 1
 
 /* Enable system power support */
 #define SDL_POWER_WINDOWS 1