[jdk17u-dev] RFR: 8319525: RISC-V: Rename *_riscv64.ad files to *_riscv.ad under riscv/gc

[Fei Yang]

On Wed, 8 Nov 2023 13:56:52 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

> I would like to backport [JDK-8319525](https://bugs.openjdk.org/browse/JDK-8319525) to make possible future backports to those AD files smooth.
> Applies not clean since 17u does not support generational-zgc yet.

LGTM.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk17u-dev/pull/1954#pullrequestreview-1720465130