[patch, gprofng, riscv64] Fix build on Linux riscv64

[Andreas Schwab]

On Sep 23 2024, Sergey Fedorov wrote:

> @@ -46,8 +50,11 @@ __get_cpuid (unsigned int op ATTRIBUTE_UNUSED, unsigned int *eax,
>  #include <sched.h>
>  #include <sys/syscall.h>
>  #include <unistd.h>
> +// This header does not exist in earlier versions.
> +#if defined(__linux__) && LINUX_VERSION_CODE >= KERNEL_VERSION(6,4,0)
>  #include <asm/hwprobe.h>
>  #endif
> +#endif

This could also use __has_include.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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