panfrost: Add FBO BOs to batch->bos earlier

panfrost: Add FBO BOs to batch->bos earlier

If we want the batch dependency tracking to work correctly we must
make sure all BOs are added to the batch->bos set early enough. Adding
FBO BOs when generating the fragment job is clearly to late. Add a
panfrost_batch_add_fbo_bos helper and call it in the clear/draw path.

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