Fix kernel-doc warnings in hbm.c:

hbm.c:98: warning: No description found for return value of 'mei_hbm_write_message'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/mei/hbm.c |    2 ++
 1 file changed, 2 insertions(+)

diff -- a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -91,6 +91,8 @@ static int mei_cl_conn_status_to_errno(e
  * @dev: mei device
  * @hdr: mei header
  * @data: payload
+ *
+ * Return: >=0 on success, <0 on error
  */
 static inline int mei_hbm_write_message(struct mei_device *dev,
 					struct mei_msg_hdr *hdr,