vec_cmpne needs separate implementation columns for ISA 2.07 and 3.0

[openpower-gitea-migrator]

Originally Gitea issue #85 by @wschmidt-ibm on 2022-02-15

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The example implementations shown for smaller data types are vcmpne[bhw], which are only available on ISA 3.0 or later. But we generate vcmpequ[bhw] and xxlnor for earlier architectures.