tenderloin usb: fix release of wakelock

The msm_otg wakelock can get 'stuck' in some cases. In particular,
when Touchpad is placed on Touchstone charger when the Touchpad
is in deep-sleep. This should allow for proper release of the
msm_otg wakelock in that and similar cases.
tenderloin defconfig: enable MSM_OTG

Change-Id: I42d5e659ea8efdcaf71153ee9e26620d482b120c
max8903b_charger: fix return val for invalid currentlimit store
msm8660: disable ondemand governor

  * The ondemand governor is broken. If enabled, the result is kernel
    panic after a short time.
  * This is obviously not a real solution, but it does protect users
    from enabling a feature that results in a crash.

Change-Id: I0db5f1b036ce0e00f594974a91f7db230a33ba4c