efi: app: Avoid freeing memory on exit

The private data is used to perform the exit, so freeing anything used
by the app may cause a hang or crash. The underlying EFI system should
be able to free any memory allocated by the app, so just skip the call
to free_memory()

Signed-off-by: Simon Glass <sjg@chromium.org>

lib/efi_client/efi_app.c

@@ -245,7 +245,6 @@ static void efi_exit(void)
 	struct efi_priv *priv = efi_get_priv();
 
 	printf("U-Boot EFI exiting\n");
-	free_memory(priv);
 	priv->boot->exit(priv->parent_image, EFI_SUCCESS, 0, NULL);
 }