fix: __cpuidex pointer type warning

[t-mat]

clang-cl warns the first argument of __cpuidex() because it's int[].

void __cpuidex(
   int cpuInfo[4],
   int function_id,
   int subfunction_id
);

https://learn.microsoft.com/en-us/cpp/intrinsics/cpuid-cpuidex

Without this patch, it reports the following warning

xxHash\xxh_x86dispatch.c(258,15): warning : passing 'xxh_u32 *'
(aka 'unsigned int *') to parameter of type 'int *' converts between pointers
to integer types with different sign [-Wpointer-sign]