gallium/ddebug: Support compute states.

gallium/ddebug: Support compute states.

v2: Reuse the macro for bind & delete.

Note that may not be able to share the delete long-term as
pipe_compute_state contains members not in pipe_shader_state,
and we need to distinguish the pointer location if we add that
struct to the union.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>