clocks: add 4470 rate

Change-Id: I3cb272d3b1a223a415069460eee4556d8c4a5ce0
sensors: move stk22x7 to input/misc + cleanup

Change-Id: Ifb0fbc11c91cf93d487fd27ee017c707054effb0
backlight: add o2micro PWM backlight driver

Change-Id: I81900f2cd8dcee5ba8f804bb31463006a9ccd4c4
touchscreen: add rotation config to ilitek touchscreen + cleanup

Change-Id: I5f9927d086338466b3d785ce72f62f0fb553a7c2
sensors: bma250 driver cleanup

Change-Id: I248de53fd29567a5676c936f50f7c39a96facf2a
backlight: board settings, fix timer init and turn off some debugging

Change-Id: I15c1bdad614b5027301f8d2ae97e57afd34c6c9b
uart3: let idle if debug_ll is off

Change-Id: I8344bdcd1230ab35740fe1c01df241e16e9ffcf4
defconfig: updates for sensor changes, touchscreen, cmdline and usb bt support

Change-Id: I24c40ada54cb497daa5bd8fea5899050bacce792