mei: nfc: Initial nfc implementation

NFC ME device is exported through the MEI bus to be consumed by the
NFC subsystem.

NFC is represented by two mei clients: An info one and the actual
NFC one. In order to properly build the ME id we first need to retrieve
the firmware information from the info client and then disconnect from it.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/mei_dev.h

@@ -509,6 +509,16 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
 
 void mei_amthif_run_next_cmd(struct mei_device *dev);
 
+/*
+ * NFC functions
+ */
+int mei_nfc_host_init(struct mei_device *dev);
+void mei_nfc_host_exit(void);
+
+/*
+ * NFC Client UUID
+ */
+extern const uuid_le mei_nfc_guid;
 
 int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
 			struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list);