IB: When attrs.udata/ufile is available use that instead of uobject

The ucontext and ufile should not be accessed via the uobject, all these
cases have an attrs so use that instead.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

include/rdma/uverbs_std_types.h

@@ -128,7 +128,7 @@ __uobj_alloc(const struct uverbs_api_object *obj,
 		rdma_alloc_begin_uobject(obj, attrs->ufile, attrs);
 
 	if (!IS_ERR(uobj))
-		*ib_dev = uobj->context->device;
+		*ib_dev = attrs->context->device;
 	return uobj;
 }