panfrost: Pass a batch to panfrost_{allocate,upload}_transient()

panfrost: Pass a batch to panfrost_{allocate,upload}_transient()

We need that if we want to upload transient buffers to a batch that's
not currently bound to the context, which in turn will be needed if we
want to relax the batch serialization we have right now (only flush
batches when we need to: on a flush request, or when one batch depends
on the result of other batches).

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>