Add devmem to busybox config.
diff --git a/common/recipes-core/busybox/busybox/busybox.cfg b/common/recipes-core/busybox/busybox/busybox.cfg
new file mode 100644
index 0000000..174a3f2
--- /dev/null
+++ b/common/recipes-core/busybox/busybox/busybox.cfg
@@ -0,0 +1 @@
+CONFIG_DEVMEM=y
diff --git a/common/recipes-core/busybox/busybox_%.bbappend b/common/recipes-core/busybox/busybox_%.bbappend
new file mode 100644
index 0000000..225f17a
--- /dev/null
+++ b/common/recipes-core/busybox/busybox_%.bbappend
@@ -0,0 +1,2 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+SRC_URI += "file://busybox.cfg"