drm/vkms: Use drmm_mode_config_init()

Use drmm_mode_config_init() instead of drm_mode_config_init(), as it allows
us to assure that the resource will be properly cleaned.
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20230116205800.1266227-2-mcanal@igalia.com

drivers/gpu/drm/vkms/vkms_drv.c

@@ -133,8 +133,12 @@ static const struct drm_mode_config_helper_funcs vkms_mode_config_helpers = {
 static int vkms_modeset_init(struct vkms_device *vkmsdev)
 {
 	struct drm_device *dev = &vkmsdev->drm;
+	int ret;
+
+	ret = drmm_mode_config_init(dev);
+	if (ret)
+		return ret;
 
-	drm_mode_config_init(dev);
 	dev->mode_config.funcs = &vkms_mode_funcs;
 	dev->mode_config.min_width = XRES_MIN;
 	dev->mode_config.min_height = YRES_MIN;