git: openjdk/jdk21: 8309258: RISC-V: Add riscv_hwprobe syscall

[Robbin Ehn]

Changeset: 087d4a8c
Author:    Robbin Ehn <rehn at openjdk.org>
Date:      2023-06-27 14:10:09 +0000
URL:       https://git.openjdk.org/jdk21/commit/087d4a8c041250174efcd790b6c585cc04a863a5

8309258: RISC-V: Add riscv_hwprobe syscall

Reviewed-by: luhenry, fyang
Backport-of: 31b6fd775f1c4f2841d9a52ad5f275ad446ee661

! src/hotspot/cpu/riscv/vm_version_riscv.cpp
! src/hotspot/cpu/riscv/vm_version_riscv.hpp
+ src/hotspot/os_cpu/linux_riscv/riscv_hwprobe.cpp
+ src/hotspot/os_cpu/linux_riscv/riscv_hwprobe.hpp
! src/hotspot/os_cpu/linux_riscv/vm_version_linux_riscv.cpp