Add vectorized packing for FP16 and BF16 for RISC-V. Reactivate vector packing for FP64 transposed #5465
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…or FP64 transposed.
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ChipKerchner
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Add vectorized packing for FP16 and BF16 - up to a 3X improvement.
Reactivate vector packing for FP64 transposed - turned out slowdown in previous MR was from use of vector load/store segment (which is slow on some platforms for FP64).