Revert "3.8: disable PM_RUNTIME and CPU_IDLE to work around gpio clock disabling"

This reverts commit 082eade17610333b597150a17169ddeb0be1d09f.
3.8: update to latest mainline

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
3.8: add reboot fix

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>