anv: don't use default pipeline cache for hits for VK_EXT_pipeline_creation_feedback
If the user didn't provide a pipeline cache and we're using the default internal pipeline cache, then we shouldn't consider a cache hit for VK_EXT_pipeline_creation_feedback as the application did not provide a cache.
Signed-off-by: Lionel Landwerlin lionel.g.landwerlin@intel.com Fixes: 6601e5d6 ("anv: implement VK_EXT_pipeline_creation_feedback")