db8500-devices: Reserve more frequency slots for extra steps

Signed-off-by: cocafe <cocafehj@gmail.com>
db8500-devices: Add missing index

...causing frequency in idx12 = 0

Signed-off-by: cocafe <cocafehj@gmail.com>
st-mmio: add highlight mode for rear flash led

Signed-off-by: cocafe <cocafehj@gmail.com>
st-mmio: Optimize flash LED interfaces

Added: Show functions

Added: Turning off handler

Renamed: highlight -> burning_led

Signed-off-by: cocafe <cocafehj@gmail.com>