NFC: pn544: Convert to use devm_request_threaded_irq()

The error handling will be neat and short when using managed resources.

Convert the driver to use devm_request_threaded_irq().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>