Added lcd inversion
Fix issue where backlight would turn on before first frame rendered
Fix issue where backlight would shortly appear at 100% before PWM is
ready during fade in
Turn off backlight before booting/RoLo/shutdown to avoid it being
enabled on next boot
Fix issue where fade in isn't smooth because brightness levels below 13 were
basically equalivent to off, by removing these brightness levels
Change-Id: I868eae2cbeea52c6af7d09c886958ff46167fe26
Calling multiple levels of indirection in a loop slows things down
Really these need to be rewritten to take a start and end address
like most of the rest of the codebase
But this is safer without having test hardware in hand
Change-Id: Idae7b92ee779d020ed7fcc9334e2d5a9c710e64d