LED eXtended ConTRoLs v1.2 (Yank555.lu)

- add possibility to set led off delay to 0 (on notification, LED always on)

SysFs Interface :

 * /sys/class/sec/led/led_intensity : 0 - 255 (100 = stock)
 *
 *     Set the relative intensity of the LED respecting the userspace's request
 *
 * /sys/class/sec/led/led_speed_on  : 1 - 5 (0 = no on time / 1 = stock)
 *
 *     Devider for delayon  (1 - 5 times shorter than requested by userspace)
 *
 * /sys/class/sec/led/led_speed_off  : 0 - 5 (0 = no off time / 1 = stock)
 *
 *     Devider for delayoff (no off time or 1 - 5 times shorter than requested by userspace)
 *
 * /sys/class/sec/led/led_xctrl_version :
 *
 *     Display the current version of the eXtended ConTRoLs
 *
 * /sys/class/sec/led/led_xctrl_info :
 *
 *     Display the current settings in human readable format