- add SoC ids for the sama5d2 SiPs
- Improve the AT91 maintainers entry
* tag 'at91-ab-4.15-soc' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
MAINTAINERS: Add SoC drivers to AT91 entry
drivers: soc: atmel: Add basic support for new sama5d2 SiPs