gallium can't directly support vertex attribute instance rate zero, since
the instance rate is also used to determine if the data is per-vertex or
per-instance in the first place (hence divisor zero meaning the data is
per vertex).
While it's an optional feature for VK_EXT_vertex_attribute_divisor, some
apps require it to work (it's a standard d3d10 feature and widely
supported), hence translate it away as MAX_UINT32 divisor instead (which
at this point probably makes more sense than to change the gallium
interface), which should work all the same.
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16526>
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