RFR: 8303147: [s390x] fast & slow debug builds are broken [v2]

[Dean Long]

On Mon, 6 Mar 2023 05:58:23 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

>> This PR fixes broken fast debug and slow debug build for s390x-arch. tier1 test are completed and results are not affect after this patch.
>
> Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   use constant instead of enum

This seems like the wrong approach, and reverts parts of JDK-8302369.

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Changes requested by dlong (Reviewer).

PR: https://git.openjdk.org/jdk/pull/12825