Add TMP421 to Palmetto config
diff --git a/meta-palmetto/recipes-kernel/linux/linux-obmc_%.bbappend b/meta-palmetto/recipes-kernel/linux/linux-obmc_%.bbappend
index 2c8056c..e4a4d85 100644
--- a/meta-palmetto/recipes-kernel/linux/linux-obmc_%.bbappend
+++ b/meta-palmetto/recipes-kernel/linux/linux-obmc_%.bbappend
@@ -1,2 +1,2 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/linux-obmc:"
-SRC_URI += "file://palmetto.dts"
+SRC_URI += "file://palmetto.dts file://palmetto.cfg"