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/configure.ac b/configure.ac
index b43e50d..07cc7de 100755
--- a/configure.ac
+++ b/configure.ac
@@ -116,6 +116,12 @@
     [AC_DEFINE([WANT_SIGNATURE_VERIFY],[],[Enable image signature validation.])])
 AM_CONDITIONAL([WANT_SIGNATURE_VERIFY_BUILD], [test "x$enable_verify_pnor_signature" == "xyes"])
 
+# setup virtual pnor support
+AC_ARG_ENABLE([virtual-pnor],
+    AS_HELP_STRING([--enable-virtual-pnor], [Enable support for virtual pnor])
+)
+AM_CONDITIONAL([VIRTUAL_PNOR_ENABLED], [test "x$enable_virtual_pnor" == "xyes"])
+
 AC_DEFINE(CHASSIS_STATE_PATH, "/xyz/openbmc_project/state/chassis0",
     [The chassis state path.])
 AC_DEFINE(CHASSIS_STATE_OBJ, "xyz.openbmc_project.State.Chassis",