[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/Documentation/ABI/testing/configfs-usb-gadget-serial b/src/kernel/linux/v4.14/Documentation/ABI/testing/configfs-usb-gadget-serial
new file mode 100644
index 0000000..474d249
--- /dev/null
+++ b/src/kernel/linux/v4.14/Documentation/ABI/testing/configfs-usb-gadget-serial
@@ -0,0 +1,9 @@
+What:		/config/usb-gadget/gadget/functions/gser.name
+Date:		Jun 2013
+KernelVersion:	3.11
+Description:
+
+		This item contains just one readonly attribute: port_num.
+		It contains the port number of the /dev/ttyGS<n> device
+		associated with gser function's instance "name".
+