[jdk17u] Integrated: 8273378: Shenandoah: Remove the remaining uses of os::is_MP

[Aleksey Shipilev]

On Thu, 30 Sep 2021 16:45:19 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Clean backport to keep codebases in sync and avoid surprises when `os::is_MP` is misbehaving.
> 
> Additional testing:
>  - [x] `hotspot_gc_shenandoah` passes

This pull request has now been integrated.

Changeset: c136c188
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.java.net/jdk17u/commit/c136c188b519aa315985c9dd0bbe9fedbf182175
Stats:     9 lines in 1 file changed: 6 ins; 3 del; 0 mod

8273378: Shenandoah: Remove the remaining uses of os::is_MP

Backport-of: fc546d6de9a3ed33cf4b04e24e62714332b069cb

-------------

PR: https://git.openjdk.java.net/jdk17u/pull/123