mei: drop redundant length parameter from mei_write_message function

The length is already part of the message header and it is validated
before the function call

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/interface.h b/drivers/misc/mei/interface.h
index ec6c785..ca73299 100644
--- a/drivers/misc/mei/interface.h
+++ b/drivers/misc/mei/interface.h
@@ -29,9 +29,8 @@
 		     unsigned long buffer_length);
 
 int mei_write_message(struct mei_device *dev,
-			     struct mei_msg_hdr *header,
-			     unsigned char *write_buffer,
-			     unsigned long write_length);
+			struct mei_msg_hdr *header,
+			unsigned char *buf);
 
 bool mei_hbuf_is_empty(struct mei_device *dev);