panfrost: Stop passing screen around for BO operations

Store a screen pointer in panfrost_bo so we don't have to pass a screen
object to all functions manipulating the BO.

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