Revert "Revert "mutex: Queue mutex spinners with MCS lock to reduce cacheline contention""

This reverts commit 8f9c880be1a842e13195e4798c8a23370373ba89.
omap: voltage: use 3.0.8 implementation
moto: modem: fix the powerdomains suspend for Edison

- It sounds weird, but since the option gas been renamed Edison won't put all powerdomains into target state (deep sleep). Re-define it with the proper name..
staging: Cleanup..
staging/voltage: cleanup