RFR: 8293840: RISC-V: Remove cbuf parameter from far_call/far_jump/trampoline_call

[Fei Yang]

On Thu, 15 Sep 2022 06:17:58 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

> Follow up [JDK-8287394](https://bugs.openjdk.org/browse/JDK-8287394), remove cbuf parameter from far_call/far_jump/trampoline in riscv.
> 
> 
> Testing:
> - Tier1 passed on unmatched board with release build

Looks OK.

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Marked as reviewed by fyang (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10277