[llvm] [AArch64][SVE] Use FeatureUseFixedOverScalableIfEqualCost for A320 (PR #152156)

[Ties Stuij via llvm-commits]

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@@ -741,7 +741,8 @@ def ProcessorFeatures {
                                  FeaturePAuth, FeaturePsUAO, FeatureRAS,
                                  FeatureRDM, FeatureTRBE, FeatureVH,
                                  FeatureFlagM, FeaturePredRes, FeatureSB, FeatureSSBS,
-                                 FeatureSVE, FeatureSVE2];
+                                 FeatureSVE, FeatureSVE2,
+                                 FeatureUseFixedOverScalableIfEqualCost];
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stuij wrote:

Done. I took the liberty to also move FeatureUseFixedOverScalableIfEqualCost to `Tune..` for A510 and A520 in this patch. Happy to make another patch for them if that's more fitting.

https://github.com/llvm/llvm-project/pull/152156