RFR: 8295273: Remove unused argument in [load/store]_sized_value on aarch64 and riscv

[Fei Yang]

On Thu, 13 Oct 2022 12:29:39 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> Remove the unused argument `Register [dst2/src2]` in [load/store]_sized_value on aarch64 and riscv ports.
> 
> Seems like they were brought in in the initial ports [JDK-8068054](https://bugs.openjdk.org/browse/JDK-8068054) [JDK-8276799](https://bugs.openjdk.org/browse/JDK-8276799) as just straight signature copies of x86. The second register is only required on x86 for x86_32 support and is unused on riscv and aarch64.
> 
> Should be a trivial removal.
> 
> Testing: Cross-compiled for riscv and aarch64. Waiting for GHA

LGTM.

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Marked as reviewed by fyang (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10698