RFR: 8322154: RISC-V: JDK-8315743 missed change in MacroAssembler::load_reserved

[Fei Yang]

On Fri, 15 Dec 2023 03:56:04 GMT, Gui Cao <gcao at openjdk.org> wrote:

> The fix for JDK-8315743 touches MacroAssembler::load_reserved replacing `t0` with `dst`. But it missed change for the third case (that is `uint32`) if the switch in this assember function. We should also replace `t0` used in `zero_extend` with `dst`. @robehn can you help confirm this?
> 
> - [ ]  Run tier1 tests on qemu 8.1.50 with UseRVV (release)

Good catch! I think we should also fix this for JDK-22.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17117#pullrequestreview-1783089797