Adding new features to LED driver

This commit is adding the following features:

- Millisecond delay_on/delay_off sysfs device file entries
  added to support <X>ms configurable LED on/off values.
- General cleanup of code.

Change-Id: I1bcf2cc8295a66c5e45ebab88ef6846698f63f72
Signed-off-by: Brian Wood <brian.j.wood@intel.com>
Reviewed-on: https://android.intel.com/425245
1 file changed