mei: revamp host buffer interface function

1. Use unified _hbuf_ prefix for host/write buffer functions.
2. Cleanup the code w/o functional changes.

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 8723d88..cd9b778 100644
--- a/drivers/misc/mei/interface.h
+++ b/drivers/misc/mei/interface.h
@@ -41,19 +41,21 @@
 			     unsigned char *write_buffer,
 			     unsigned long write_length);
 
-int mei_host_buffer_is_empty(struct mei_device *dev);
+bool mei_hbuf_is_empty(struct mei_device *dev);
 
-int mei_count_full_read_slots(struct mei_device *dev);
-
-int mei_count_empty_write_slots(struct mei_device *dev);
-
-int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
+int mei_hbuf_empty_slots(struct mei_device *dev);
 
 static inline size_t mei_hbuf_max_data(const struct mei_device *dev)
 {
 	return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
 }
 
+int mei_count_full_read_slots(struct mei_device *dev);
+
+
+int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
+
+
 
 int mei_wd_send(struct mei_device *dev);
 int mei_wd_stop(struct mei_device *dev, bool preserve);