v3dv/bo: add dump stats info

Focused specially on the cache, how many BOs and how much bo_size is
store on the cache, freed bos, bos moved to cache etc.

Initially not configured with V3D_DEBUG (like v3d) to avoid a runtime
check on most of v3dv_bo functions.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
1 file changed