[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/meta/meta-mediatek-mt2731/recipes-kernel/linux/files/user_build.cfg b/meta/meta-mediatek-mt2731/recipes-kernel/linux/files/user_build.cfg
new file mode 100644
index 0000000..107e606
--- /dev/null
+++ b/meta/meta-mediatek-mt2731/recipes-kernel/linux/files/user_build.cfg
@@ -0,0 +1 @@
+CONFIG_CONSOLE_LOGLEVEL_DEFAULT=4