Merge tag 'gpio-updates-for-v5.10-part2' of...

Merge tag 'gpio-updates-for-v5.10-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel

gpio updates for v5.10 - part 2

- refactor gpio-mockup testing module
- simplify the code in gpio-mpc8xxx
- implement v2 of the GPIO user API