meta-romulus: Add CPLD workaround

Romulus power on scripts requires a workaround to trigger CPLD to give
pgood signal after vcs_workaround.
Add this as cpld_trigger service that runs after vcs_workaround and
before obmc-host-start-pre.

Change-Id: I0723bad38a5832f0bb2a8776129885308a8e644a
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/meta-romulus/recipes-phosphor/chassis/cpld-trigger/cpld_trigger.sh b/meta-romulus/recipes-phosphor/chassis/cpld-trigger/cpld_trigger.sh
new file mode 100644
index 0000000..9c7bf9a
--- /dev/null
+++ b/meta-romulus/recipes-phosphor/chassis/cpld-trigger/cpld_trigger.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Trigger CPLD to give pgood signal
+gpioutil -p S7 -d out -v 0