RFR: 8255799: AArch64: CPU_A53MAC feature may be set incorrectly

[Anton Kozlov]

On Fri, 6 Nov 2020 01:24:22 GMT, Nick Gasson <ngasson at openjdk.org> wrote:

>> Follow-up patch for PR #1039. As clarified by @nick-arm, CPU_A53MAC was set to workaround old Linux bug when A53 cores may be available if only a single A57 core is reported in /proc/cpuinfo. The workaround was broken recently but the bug is assumed to be fixed everywhere, so the workaround can be removed completely.
>> 
>> CCing old participants: @theRealAph @adinn
>
> LGTM (I'm not a Reviewer)

All credits should go to @nick-arm, who's explanation helped to connect the dots. Thanks!

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PR: https://git.openjdk.java.net/jdk/pull/1084