Set dropbearkey service to start on boot
Before this patch it isn't started until the first
client connection which is not the desired behavior.
diff --git a/meta-phosphor/common/recipes-core/dropbear/dropbear_%.bbappend b/meta-phosphor/common/recipes-core/dropbear/dropbear_%.bbappend
new file mode 100644
index 0000000..36c0dcd
--- /dev/null
+++ b/meta-phosphor/common/recipes-core/dropbear/dropbear_%.bbappend
@@ -0,0 +1,2 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+SRC_URI += "file://dropbearkey.service"