[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/sound/oss/v_midi.h b/src/kernel/linux/v4.14/sound/oss/v_midi.h
new file mode 100644
index 0000000..f4fc2be
--- /dev/null
+++ b/src/kernel/linux/v4.14/sound/oss/v_midi.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+typedef struct vmidi_devc {
+	   int dev;
+
+	/* State variables */
+	   int opened;
+	   spinlock_t lock;
+
+	/* MIDI fields */
+	   int my_mididev;
+	   int pair_mididev;
+	   int input_opened;
+	   int intr_active;
+	   void (*midi_input_intr) (int dev, unsigned char data);
+	} vmidi_devc;