NFC: Introduce a presence check

Introduce a check for the QCA1990 NFC controller hardware.
If I2C communication is unsuccessful we exit start-up sequence early
and ensure HPD is set(incase faulty hardware is present) and clock
is disabled.

Change-Id: Ic20f8cfa0219927eb4b30343b916d414757a3b37
Acked-by: Umesh Jagga <ujagga@qti.qualcomm.com>
Signed-off-by: Houston Hoffman <hhoffman@codeaurora.org>