as3645a: Use integer numbers for parsing LEDs

Use integer numbers for LEDs, 0 is the flash and 1 is the indicator.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>