llvmpipe: fix nr_sampler_view in key creation.
This was doing MAX2() but nr_sampler_views hasn't been initialised yet.
Fixes: 690cc3bb ("llvmpipe: overhaul fs/cs variant keys to be simpler.")
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This was doing MAX2() but nr_sampler_views hasn't been initialised yet.
Fixes: 690cc3bb ("llvmpipe: overhaul fs/cs variant keys to be simpler.")