Update references to mbedtls_dev

Change these to point to the new mbedtls_framework module in the
framework submodule.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/tests/scripts/generate_ecp_tests.py b/tests/scripts/generate_ecp_tests.py
index df1e469..c5281ad 100755
--- a/tests/scripts/generate_ecp_tests.py
+++ b/tests/scripts/generate_ecp_tests.py
@@ -11,11 +11,11 @@
 import sys
 
 import scripts_path # pylint: disable=unused-import
-from mbedtls_dev import test_data_generation
+from mbedtls_framework import test_data_generation
 # Import modules containing additional test classes
 # Test function classes in these modules will be registered by
 # the framework
-from mbedtls_dev import ecp # pylint: disable=unused-import
+from mbedtls_framework import ecp # pylint: disable=unused-import
 
 if __name__ == '__main__':
     # Use the section of the docstring relevant to the CLI as description