RFR: 8369685: RISC-V: refactor code related to RVFeatureValue::enabled [v3]

[Robbin Ehn]

On Thu, 16 Oct 2025 14:03:10 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> Hi,
>> Can you help to review this patch?
>> @RealFYang 
>> 
>> Original discussion is here: https://github.com/openjdk/jdk/pull/27562#discussion_r2415984981.
>> Although seems we can not remove it, but we can still remove some of the redundant check like `mvendorid.enabled()`.
>> And also do some simple refactoring related to enable/disable/enabled and so on.
>> 
>> Thanks
>
> Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:
> 
>   use DEFAULT_VALUE for RVExtFeatureValue::value()

Marked as reviewed by rehn (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27771#pullrequestreview-3345599056