NFC: add NQxxxx driver

Add new NCI driver with support for NQxxxx controller.

This is a character device driver. It enables control of the
NQx NFC controller using the i2c bus and GPIOs.

Change-Id: I807273821dc3405813b3ef2bf02f41a478293f43
Acked-by: Afroditi Ilioudi <ailioudi@qti.qualcomm.com>
Signed-off-by: Puneet Mishra <puneetm@codeaurora.org>