Tune generic SVE parameters closer to other SVE cores and add tunings to baseline AArch64 #4833
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This allows us to use the `ARMV8` and `ARMV8SVE` targets in a minimal build without losing too much performance.
Previously this was left without `SWITCH_RATIO` or `GEMM_PREFERED_SIZE` and older default values, but it can be seen across other cores that these values seem to work for many devices.
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Previously baseline AArch64 was left without
SWITCH_RATIOorGEMM_PREFERED_SIZEand older default values, but it can be seen across other cores that these values seem to work for many devices.This should allow us to use the
ARMV8andARMV8SVEtargets in a minimal build without losing too much performance.