staging: line6: rename MidiBuffer to avoid CamelCase

Fix checkpatch.pl warnings related to MidiBuffer:

  WARNING: Avoid CamelCase: <MidiBuffer>
  #947: FILE: staging/line6/driver.c:363:
  +       struct MidiBuffer *mb = &line6->line6midi->midibuf_in;

Rename MidiBuffer to midi_buffer.

Note that "midibuf" would be another good name but sound/oss/midibuf.c
already uses it for a different concept.  Avoid possible confusion by
using "midi_buffer" instead.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/line6/midibuf.h b/drivers/staging/line6/midibuf.h
index 444cb3a..707482b 100644
--- a/drivers/staging/line6/midibuf.h
+++ b/drivers/staging/line6/midibuf.h
@@ -12,7 +12,7 @@
 #ifndef MIDIBUF_H
 #define MIDIBUF_H
 
-struct MidiBuffer {
+struct midi_buffer {
 	unsigned char *buf;
 	int size;
 	int split;
@@ -21,18 +21,18 @@
 	int command_prev;
 };
 
-extern int line6_midibuf_bytes_used(struct MidiBuffer *mb);
-extern int line6_midibuf_bytes_free(struct MidiBuffer *mb);
-extern void line6_midibuf_destroy(struct MidiBuffer *mb);
-extern int line6_midibuf_ignore(struct MidiBuffer *mb, int length);
-extern int line6_midibuf_init(struct MidiBuffer *mb, int size, int split);
-extern int line6_midibuf_read(struct MidiBuffer *mb, unsigned char *data,
+extern int line6_midibuf_bytes_used(struct midi_buffer *mb);
+extern int line6_midibuf_bytes_free(struct midi_buffer *mb);
+extern void line6_midibuf_destroy(struct midi_buffer *mb);
+extern int line6_midibuf_ignore(struct midi_buffer *mb, int length);
+extern int line6_midibuf_init(struct midi_buffer *mb, int size, int split);
+extern int line6_midibuf_read(struct midi_buffer *mb, unsigned char *data,
 			      int length);
-extern void line6_midibuf_reset(struct MidiBuffer *mb);
-extern int line6_midibuf_skip_message(struct MidiBuffer *mb,
+extern void line6_midibuf_reset(struct midi_buffer *mb);
+extern int line6_midibuf_skip_message(struct midi_buffer *mb,
 				      unsigned short mask);
-extern void line6_midibuf_status(struct MidiBuffer *mb);
-extern int line6_midibuf_write(struct MidiBuffer *mb, unsigned char *data,
+extern void line6_midibuf_status(struct midi_buffer *mb);
+extern int line6_midibuf_write(struct midi_buffer *mb, unsigned char *data,
 			       int length);
 
 #endif