meta-romulus: Make vcs_workaround execute after avsbus-enable

This is a workaround for Romulus, that pgood will not be ready before
CPLD triggers it, and vcs_workaround is expected to be done before CPLD
trigger.

The common vcs_workaround is executed after pgood is asserted, so on
Romulus it will not get executed since pgood won't be asserted.
This commit moves vcs_workaround after avsbus-enable and before CPLD
trigger, so it will be executed in a proper step.

Change-Id: I3899153023070a995393e7c8554c37b7f1b86996
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/meta-romulus/recipes-phosphor/host/p9-vcs-workaround.bbappend b/meta-romulus/recipes-phosphor/host/p9-vcs-workaround.bbappend
new file mode 100644
index 0000000..8e1072c
--- /dev/null
+++ b/meta-romulus/recipes-phosphor/host/p9-vcs-workaround.bbappend
@@ -0,0 +1 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/op-pdbg-host-control:"