[riscv-port] RFR: 8277877: C2 fast_unlock intrinsic on riscv has unnecessary ownership check

[Fei Yang]

On Sat, 27 Nov 2021 03:27:00 GMT, Yadong Wang <yadongwang at openjdk.org> wrote:

> It's an optional, maybe only for debug, to check the owner of the lock in the fast_unlock intrinsic in riscv, which already applied in AArch64.

Looks good.

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Marked as reviewed by fyang (Lead).

PR: https://git.openjdk.java.net/riscv-port/pull/14