BLN Support

* Credits to Jeffrey Clark @h0tw1r3 with very slight modifications by myself to work with the post 4/24 CM android_kernel_samsung_msm8660-common Kernels. For original commit see 4d81881fbe5915eac03d6548bcde42bb356ad3a2

Signed-off-by: Chester Kener <Cl3Kener@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
BLN: Allow blink interval override

Currently the blink interval is determined by the current notification's params. Allow the user to override the intervals through sysfs.

EG:
    echo "700 3000" > /sys/class/misc/backlightnotification/override_blink_interval
This setting would luminate the lights for 700 msecs every 3 secs

    echo "" > /sys/class/misc/backlightnotification/override_blink_interval$
This setting will disable overriding and go back to regular intervals set by notifications.

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>