RFR: 8290280: riscv: Clean up stack and register handling in interpreter [v4]

[Feilong Jiang]

On Mon, 18 Jul 2022 01:22:04 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> Feilong Jiang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   fix
>
> Updated changes looks good.

@RealFYang Thanks！

-------------

PR: https://git.openjdk.org/jdk/pull/9487