Move updatesymlinks to new vpnor feature

The updatesymlinks functionality is to support virtual pnor and it
does not depend on the filesystem type. Move it to a new vpnor
feature so that users can make use of this feature without being
tied to UBI, for example on a eMMC that has a combined BMC+PNOR
image.

Tested: Verified that the witherspoon image contained the new
        script and service file and that it powered on to the host.

Change-Id: Ic5e51dfde81718e5e285f010be67afbd58eac2e1
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/vpnor/obmc-vpnor-updatesymlinks.service b/vpnor/obmc-vpnor-updatesymlinks.service
new file mode 100644
index 0000000..8184f51
--- /dev/null
+++ b/vpnor/obmc-vpnor-updatesymlinks.service
@@ -0,0 +1,15 @@
+[Unit]
+Description=Updates symlinks for active PNOR version
+Before=mboxd.service
+Before=mboxd-reload@0.service
+After=org.open_power.Software.Host.Updater.service
+After=op-reset-chassis-running@0.service
+ConditionPathExists=!/run/openbmc/chassis@0-on
+
+[Service]
+Type=oneshot
+RemainAfterExit=no
+ExecStart=/usr/bin/obmc-vpnor-util updatesymlinks
+
+[Install]
+WantedBy=mboxd.service mboxd-reload@.service