Revert "Add generated files"

This reverts commit 0d1117692ee261d6d89e2819a742c64e06e5bd42.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5f5afb2..51944fa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,7 +72,7 @@
     # CMakeLists.txt.
     option(GEN_FILES "Generate the auto-generated files as needed" OFF) # off in development
 else()
-    option(GEN_FILES "Generate the auto-generated files as needed" OFF)
+    option(GEN_FILES "Generate the auto-generated files as needed" ON)
 endif()
 
 option(DISABLE_PACKAGE_CONFIG_AND_INSTALL "Disable package configuration, target export and installation" ${MBEDTLS_AS_SUBPROJECT})