OpenCL-CTS `test_relationals relational_any` fails on Panfrost with an
assertion:
```
src/panfrost/compiler/pan_nir_lower_bool_to_bitsize.c:296:
lower_alu_instr: Assertion `alu->def.bit_size > 1' failed.
```
Bool to bitsize pass handles 2, 3 and 4-wide boolean reduction, but does
not handle 8 and 16, which fall-through to the default case, producing
1-bit bools.
Fixes: 5de5987678 ("nir,panfrost: Move lower_bool_to_bitsize to
panfrost")
Signed-off-by: Ahmed Hesham <ahmed.hesham@arm.com>
Reviewed-by: Christoph Pillmayer <christoph.pillmayer@arm.com>
Reviewed-by: Eric R. Smith <eric.smith@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41770>
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