NFC: NCI: Add setup handler

Some drivers require special configuration while initializing.
This patch adds setup handler for this custom configuration.

Signed-off-by: Amitkumar Karwar <[e-mail]>
Signed-off-by: Bing Zhao <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

include/net/nfc/nci_core.h

···
 	int (*open)(struct nci_dev *ndev);
 	int (*close)(struct nci_dev *ndev);
 	int (*send)(struct nci_dev *ndev, struct sk_buff *skb);
+	int (*setup)(struct nci_dev *ndev);
 };
 
 #define NCI_MAX_SUPPORTED_RF_INTERFACES		4

net/nfc/nci/core.c

···
 	rc = __nci_request(ndev, nci_reset_req, 0,
 			   msecs_to_jiffies(NCI_RESET_TIMEOUT));
 
+	if (ndev->ops->setup(ndev))
+		ndev->ops->setup(ndev);
+
 	if (!rc) {
 		rc = __nci_request(ndev, nci_init_req, 0,
 				   msecs_to_jiffies(NCI_INIT_TIMEOUT));