mei: use unified format for printing mei message header

Introduce MEI_HDR_FMT and MEI_HDR_PRM macros.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index 8a9313a..77acd23 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -457,8 +457,7 @@
 		return 0;
 	}
 
-	dev_dbg(&dev->pdev->dev, "msg: len = %d complete = %d\n",
-			mei_hdr->length, mei_hdr->msg_complete);
+	dev_dbg(&dev->pdev->dev, MEI_HDR_FMT,  MEI_HDR_PRM(mei_hdr));
 
 	*slots -=  msg_slots;
 	if (mei_write_message(dev, mei_hdr,