wspoon: Run MSL verify service

Perform MSL verification by default on Witherspoon systems, prior to
allowing the chassis to power on.

For information on disabling MSL verification, consult:

https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/xyz/openbmc_project/Control/MinimumShipLevel.interface.yaml

Resolves: openbmc/openbmc#2060

Change-Id: Ib8666435ef598bc381edc4ccfb109be8a733a336
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-witherspoon/recipes-phosphor/dbus/phosphor-dbus-monitor.bbappend b/meta-witherspoon/recipes-phosphor/dbus/phosphor-dbus-monitor.bbappend
new file mode 100644
index 0000000..e80b499
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/dbus/phosphor-dbus-monitor.bbappend
@@ -0,0 +1 @@
+SYSTEMD_LINK_phosphor-msl-verify = "../phosphor-msl-verify.service:obmc-chassis-poweron@0.target.requires/phosphor-msl-verify.service"