Correct type for sysctl argument to fix the build.
../src/util/u_cpu_detect.c:631:29: error: incompatible pointer types passing 'int *' to parameter of type 'size_t *' (aka 'unsigned long *') [-Werror,-Wincompatible-pointer-types]
sysctl(mib, 2, &ncpu, &len, NULL, 0);
^~~~
Fixes: 5623c75e40 ("util: Fix setting nr_cpus on some BSD variants")
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13448>
(cherry picked from commit afece589dc)
43be854eef