rcache/grdma: fix typo in cuda code

Fixes open-mpi#1702

Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>

(back-port of open-mpi/ompi@af52dad)

Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>

opal/mca/mpool/grdma/mpool_grdma_module.c

@@ -523,7 +523,7 @@ static int check_for_cuda_freed_memory(mca_mpool_base_module_t *mpool, void *add
     /* This memory has been freed.  Find all registrations and delete. Ensure they are deregistered
      * now by passing dereg_mem as the delete function. This is safe because the rcache lock is
      * recursive and this is only called from register. */
-    return mpool->rcache->rcache_iterate (mpool->rcache, base, size, gc_add, NULL);
+    return mpool->rcache->rcache_iterate (mpool->rcache, addr, size, gc_add, NULL);
 }
 #endif /* OPAL_CUDA_GDR_SUPPORT */