RFR: 8324750: C2: rename Matcher methods using "superword" -> "autovectorization"

[Vladimir Kozlov]

On Fri, 26 Jan 2024 09:53:53 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> Subtask of https://github.com/openjdk/jdk/pull/16620
> 
> Matcher::superword_max_vector_size -> Matcher::max_vector_size_autovectorization
> 
> Matcher::match_rule_supported_superword -> match_rule_supported_autovectorization
> 
> This is to make the naming more general, since these methods can be used by any autovectorizer in the future.

Good and I think trivial.

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17583#pullrequestreview-1846213375