doc: release-notes: add notes for few session with no maintainers

Add few release notes from changes in sections that do not list an
explicit maintainer, taken from:

git log v3.1.0..main drivers/interrupt_controller
git log v3.1.0..main drivers/memc
git log v3.1.0..main drivers/power_domain

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
1 file changed