RFR: 8301067: RISC-V: better error message when reporting unsupported satp modes

[Fei Yang]

On Fri, 27 Jan 2023 09:39:46 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

> Add more detailed information to the error log when reporting unsupported stap modes.
> Currently, RISC-V port only supports up to sv48.

Don't forget to update the copyright years.

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PR: https://git.openjdk.org/jdk/pull/12247