NFC: fdp: make struct nci_ops static

The structure nci_ops is local to the source and does not need to
be in global scope, so make it static.

Cleans up sparse warning:
symbol 'nci_ops' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/fdp/fdp.c

@@ -726,7 +726,7 @@ static struct nci_driver_ops fdp_prop_ops[] = {
 	},
 };
 
-struct nci_ops nci_ops = {
+static struct nci_ops nci_ops = {
 	.open = fdp_nci_open,
 	.close = fdp_nci_close,
 	.send = fdp_nci_send,