drivers: nfc: make nq-nci probe as async probe

Probe function calls sleep in hardware check, which
stalls kernel booting.
Make the probe as async function to optimize boot time.

Change-Id: Idbc679951ff7bd6fcfac4ba330452e29d78d86dd
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>