Ensure drivers have threading enabled if required

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index c25f044..37cf6af 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -889,6 +889,16 @@
     # Dynamic secure element support is a deprecated feature and needs to be disabled here.
     # This is done to have the same form of psa_key_attributes_s for libdriver and library.
     scripts/config.py unset MBEDTLS_PSA_CRYPTO_SE_C
+
+    # If threading is enabled on the normal build, then we need to enable it in the drivers as well,
+    # otherwise we will end up running multithreaded tests without mutexes to protect them.
+    if scripts/config.py get MBEDTLS_THREADING_C; then
+        scripts/config.py -f "$CONFIG_TEST_DRIVER_H" set MBEDTLS_THREADING_C
+    fi
+
+    if scripts/config.py get MBEDTLS_THREADING_PTHREAD; then
+        scripts/config.py -f "$CONFIG_TEST_DRIVER_H" set MBEDTLS_THREADING_PTHREAD
+    fi
 }
 
 # When called with no parameter this function disables all builtin curves.