NFC: pn544_i2c: Fix null pointer exception when not using platform data

Fixes a null pointer exception occurring when the IRQ request in
pn544_hci_i2c_probe fails and no platform data is available.

Signed-off-by: Clément Perrochaud <clement.perrochaud@nxp.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/pn544/i2c.c

@@ -1029,8 +1029,12 @@ err_hci:
 	free_irq(client->irq, phy);
 
 err_rti:
-	if (pdata->free_resources != NULL)
+	if (!pdata) {
+		gpio_free(phy->gpio_en);
+		gpio_free(phy->gpio_fw);
+	} else if (pdata->free_resources) {
 		pdata->free_resources();
+	}
 
 	return r;
 }