[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/sound/oss/mpu401.h b/src/kernel/linux/v4.14/sound/oss/mpu401.h
new file mode 100644
index 0000000..6beb8c2
--- /dev/null
+++ b/src/kernel/linux/v4.14/sound/oss/mpu401.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*	From uart401.c */
+int probe_uart401 (struct address_info *hw_config, struct module *owner);
+void unload_uart401 (struct address_info *hw_config);
+
+irqreturn_t uart401intr (int irq, void *dev_id);
+
+/*	From mpu401.c */
+int probe_mpu401(struct address_info *hw_config, struct resource *ports);
+int attach_mpu401(struct address_info * hw_config, struct module *owner);
+void unload_mpu401(struct address_info *hw_info);