enable BLN support
bln: new driver with kernel blink and rate support [2/2]

	* New bln driver handles all notification logic
	* Support blink with separate led on/off freq

Change-Id: I6cd264c2fb519d98319776e0c2b78dac34bacd95

Conflicts:
	drivers/input/keyboard/Kconfig
	drivers/input/keyboard/cypress-touchkey.c