32 should have a name

[jnider]

PIM-Embedding-Lookup/upmem/src/dpu/emb_dpu_lookup.c

Line 16 in 8c96b12

__mram_noinit uint32_t input_indices[32*MAX_NR_BATCHES];

I see you used '32' a couple of times, but it's not clear to me what it represents. Is this the number of DPUs? In any case, it will be easier for everyone if this has a symbolic name.