[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-loopback b/src/kernel/linux/v4.14/Documentation/ABI/testing/configfs-usb-gadget-loopback
new file mode 100644
index 0000000..06beefb
--- /dev/null
+++ b/src/kernel/linux/v4.14/Documentation/ABI/testing/configfs-usb-gadget-loopback
@@ -0,0 +1,8 @@
+What:		/config/usb-gadget/gadget/functions/Loopback.name
+Date:		Nov 2013
+KernelVersion:	3.13
+Description:
+		The attributes:
+
+		qlen		- depth of loopback queue
+		buflen		- buffer length