RFR: 8286704: G1: Call offset_of directly in subclasses of G1CardSetContainer

[Albert Mingkun Yang]

On Fri, 13 May 2022 10:19:02 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple cleanup in subclasses of `G1CardSetContainer`.
> 
> Test: build

Thanks for the review.

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

PR: https://git.openjdk.java.net/jdk/pull/8698