efi_loader: expose END device path node

This commit exposes the END device path node.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 5b41985..3a63a1f 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -802,6 +802,9 @@
 	(((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
 	 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
 
+/* template END node: */
+extern const struct efi_device_path END;
+
 /* Indicate supported runtime services */
 efi_status_t efi_init_runtime_supported(void);