anv: reuse object string for RMV token
The current code is not handling the potential NULL pointer in VkDebugUtilsObjectNameInfoEXT::pObjectName Signed-off-by:Lionel Landwerlin <lionel.g.landwerlin@intel.com> Fixes: e1b9a6e4 ("anv: initial RMV support") Reviewed-by:
Faith Ekstrand <faith.ekstrand@collabora.com> Part-of: <mesa/mesa!30516> (cherry picked from commit c6bf1f02)