panfrost: Rework dirty tracking for Valhall

panfrost: Rework dirty tracking for Valhall

Midgard aggregates a large amount of state into its renderer state descriptor.
Our current dirty tracking reflects this, with a single RENDERER dirty flag.
That won't work well on Valhall, which splits out orthogonal state into
independent descriptors (a blend descriptor, a depth/stencil descriptor, and so
on). To prepare for Valhall support, this patch moves the driver to finer dirty
tracking.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15956>