RFR: 8258953: AArch64: move NEON instructions to aarch64_neon.ad

[Andrew Haley]

On 1/28/21 1:41 AM, Dong Bo wrote:
> The last two commits just simply move code around in `aarch64_neon.ad` to put related instructions together, i.e. `LoadStore` [3], `Reduction` [4].

I might even do these as separate changes.

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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