pm8xxx-vibrator: Add voltage level setting to timed_output class.

Userspace can now control the voltage of the vibrator, thus changing the
intensity.
Revert "mogami-vibrator: import and fixups for 3.4"

This reverts commit 92eb1909d1aca9d73fb4b8a5c12da56763c9329a.

Change-Id: I9b4d3006e48019a045363038b35ff35bc936cb01
pm8xxx-vibrator: Add default voltage level setting

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: Ia4643660aedeb572136e60f9453440d24a2950eb
mogami-board: Add & Enable PM8XXX vibrator.

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I5a40789c2366e8587d8ba36ade224dec21dabdd8
defconfigs: updates for pm8xxx vibrator changes

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I950f9a1160530091ed28e5e6f500c129032010de