v3dv: do not rewrite blit spec for combined depth/stencil in get_blit_pipeline

Now that our blit shader interface supports color writemasks and swizzles,
users can specify depth/stencil blits as color blits properly when needed,
so let's just do instead, which is more straight forward and less error prone.

Because s8d24 to s8d24 blits always require the same conversion to color blit,
the blit shader will handle these automatically, including blits of just one
aspect, however, for scenarios where there are additional semantics to consider
(particularly, copies from/to buffer), it is still up to the blit shader caller
to specify a proper color blit matching the required semantics.

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