Correct namespacing definitions for mlkem braid test

Signed-off-by: Rod Chapman <rodchap@amazon.com>

Author: rod-chapman

test/configs/configs.yml

@@ -469,7 +469,6 @@ configs:
   - path: test/configs/test_mlkem_braid_config.h
     description: "Enable ML-KEM Braid API"
     defines:
-      MLK_CONFIG_NAMESPACE_PREFIX: mlk
       MLK_CONFIG_ENABLE_MLKEM_BRAID: true
       MLK_CONFIG_FILE:
         comment: "/* No need to set this -- we _are_ already in a custom config */"

test/configs/test_mlkem_braid_config.h

@@ -29,7 +29,6 @@
  *
  * This configuration differs from the default mlkem/mlkem_native_config.h in
  * the following places:
- *   - MLK_CONFIG_NAMESPACE_PREFIX
  *   - MLK_CONFIG_ENABLE_MLKEM_BRAID
  */
 
@@ -79,7 +78,9 @@
  *
  * This can also be set using CFLAGS.
  */
-#define MLK_CONFIG_NAMESPACE_PREFIX mlk
+#if !defined(MLK_CONFIG_NAMESPACE_PREFIX)
+#define MLK_CONFIG_NAMESPACE_PREFIX MLK_DEFAULT_NAMESPACE_PREFIX
+#endif
 
 /**
  * MLK_CONFIG_MULTILEVEL_BUILD