lima: implement PLB PP stream cache

lima: implement PLB PP stream cache

Generating PLB PP stream is expensive. PLB PP stream content depends on
damage, and if damage consists of several rects it's impossible to come
up with a simple key.

Simplify damage to a single bounding box so we have a simple key
and cache PLB PP stream. Cache size is limited to 0.1% of system RAM and
once limit is reached least recently used entries are dropped.

Reviewed-by: Qiang Yu <yuq825@gmail.com>
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3834>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3834>