pico-imx6ul: Enable rfkill for picoimx board for Bluetooth

Assign the BT_REG_ON pin to rfkill.
Disable lcdif in DTS due the BT_REG_ON reuse in it.

Change-Id: I77d66e8ab745f3a26703c4acb34736d771dd71cf
Signed-off-by: Haoran Wang <Haoran.Wang@freescale.com>
1 file changed