NFC: Set the NFC device RF mode appropriately

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/nfc.h b/include/linux/nfc.h
index d124e92..f4e6dd9 100644
--- a/include/linux/nfc.h
+++ b/include/linux/nfc.h
@@ -146,6 +146,7 @@
 /* NFC RF modes */
 #define NFC_RF_INITIATOR 0
 #define NFC_RF_TARGET    1
+#define NFC_RF_NONE      2
 
 /* NFC protocols masks used in bitsets */
 #define NFC_PROTO_JEWEL_MASK	(1 << NFC_PROTO_JEWEL)