[riscv-port-jdk11u:riscv-port] RFR: 8287552: riscv: Fix comment typo in li64

[Fei Yang]

On Wed, 11 Sep 2024 03:45:14 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Please review this backport to riscv-port-jdk11u.
> Backport of [JDK-8287552](https://bugs.openjdk.java.net/browse/JDK-8287552). Applies not cleanly because [JDK-8339248](https://bugs.openjdk.org/browse/JDK-8339248) remove li64 macro assembler routine and related code. 
> So this patch only unifies the immediate type in movptr_with_offset to int64_t.
> 
> Testing:
> 
> - Tier1 passed without new failure on lp4a(release).

Marked as reviewed by fyang (Lead).

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PR Review: https://git.openjdk.org/riscv-port-jdk11u/pull/29#pullrequestreview-2296922749