git: openjdk/riscv-port-jdk17u: riscv-port: backport JDK-8290496 (#2)

[duke]

Changeset: 501e1b10
Author:    Dingli Zhang <dingli at iscas.ac.cn>
Committer: GitHub <noreply at github.com>
Date:      2023-02-28 18:54:32 +0000
URL:       https://git.openjdk.org/riscv-port-jdk17u/commit/501e1b10fc2b88545f6cc660138ebcd36110e6fc

backport JDK-8290496 (#2)


! src/hotspot/cpu/riscv/nativeInst_riscv.hpp
! src/hotspot/cpu/riscv/vtableStubs_riscv.cpp