Revert "Auto-generated files for v3.5.0"

This reverts commit 591416f32b7a6472aa988c5106edbf334e228d2e.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/library/Makefile b/library/Makefile
index 8e94f73..9e2d723 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -321,7 +321,7 @@
 generated_files: $(GENERATED_FILES)
 
 # See root Makefile
-GEN_FILES ?=
+GEN_FILES ?= yes
 ifdef GEN_FILES
 gen_file_dep =
 else