Revert "PM / Sleep: Implement opportunistic sleep, v2"

This reverts commit 55b983660e358447d71798c703d6a8ef15350c12.

Conflicts:

	kernel/power/autosleep.c
	kernel/power/main.c
Revert "PM / Sleep: Add wake lock api wrapper on top of wakeup sources"

This reverts commit 90cce09d92f0b2d286617874ab878911a8db16a0.
PM: Add back some Kconfig options.