v3dv: implement vkCmdCopyImageToBuffer

For now we only support the TLB path, which limits us to copying
regions that start at offset (0,0). In the future, we will need to add
a fallback path that uses blitting to copy regions with an offset.

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