Revert "defconfig: update"

This reverts commit af229a92ad8d095260ce8f0c8e8b6ced8d288883.
Revert "rtc: alarm fix"

This reverts commit d923dc4aa98f2aa79e31f618b378683f7ce4faec.
Revert "alarmtimers: Squash upstream changes"

This reverts commit 4c761c2e2896388a228fbfd28f5250c7fe11def1.