RFR: 8271930: Simplify end_card calculation in G1BlockOffsetTablePart::verify [v2]

[Ivan Walulya]

On Mon, 23 Aug 2021 08:36:52 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simplify `end_card` calculation and some general cleanup.
>> 
>> Test: hotspot_gc
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Lgtm!

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Marked as reviewed by iwalulya (Committer).

PR: https://git.openjdk.java.net/jdk/pull/5015