efi_loader: initialization of variable services

Provide an initialization routine for variable services.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/efi_loader.h b/include/efi_loader.h
index de1e67f..d30c4e8 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -325,6 +325,8 @@
 
 /* Initialize efi execution environment */
 efi_status_t efi_init_obj_list(void);
+/* Initialize variable services */
+efi_status_t efi_init_variables(void);
 /* Called by bootefi to initialize root node */
 efi_status_t efi_root_node_register(void);
 /* Called by bootefi to initialize runtime */