input: glorious touchkey backlight animation

- Change 8921_l10 configuration to expose full LDO regulator limits
- Add a trivial interface to reduce 8921_l10 voltage
- Add toggleable animation code for brightness changes
- Add hacky backlight brightness adjustment
- Break suspend sequence up to avoid waiting 500ms for the animation
- Probably break BLN; sorry, jt1134
input: break touchscreen init up

No reason to wait around 120ms while the TS initializes.
video: msm: fix a few warnings