Swift: Run power-workarounds after PGOOD

On swift, the VRMs that power-workarounds.sh touches can't communicate
until the system has been powered on.  Rearrange the services to make
this happen.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: Idc9a721c1eddb90024cb3c7c751e72cb7d926b2d
diff --git a/meta-witherspoon/recipes-phosphor/chassis/avsbus-control/swift/power-workarounds@.service b/meta-witherspoon/recipes-phosphor/chassis/avsbus-control/swift/power-workarounds@.service
new file mode 100644
index 0000000..0926e03
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/chassis/avsbus-control/swift/power-workarounds@.service
@@ -0,0 +1,16 @@
+[Unit]
+Description=Perform power workarounds on VRMs after PGOOD is up
+Wants=obmc-power-on@%i.target
+After=obmc-power-on@%i.target
+Before=obmc-host-start-pre@%i.target
+Conflicts=obmc-chassis-poweroff@%i.target
+ConditionPathExists=!/run/openbmc/chassis@%i-on
+
+[Service]
+ExecStart=/usr/bin/power-workarounds.sh
+SyslogIdentifier=power-workarounds.sh
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+WantedBy=obmc-chassis-poweron@%i.target