[jdk23] RFR: 8334715: [riscv] Mixed use of tab and whitespace in riscv.ad

[SendaoYan]

On Fri, 21 Jun 2024 15:56:35 GMT, SendaoYan <syan at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [93d98027](https://github.com/openjdk/jdk/commit/93d98027649615afeeeb6a9510230d9655a74a8f) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by SendaoYan on 21 Jun 2024 and was reviewed by Christian Hagedorn and Amit Kumar.
> 
> Thanks!

Thanks for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/19834#issuecomment-2184761673