Revert "Name reverse functional association "functional""

This reverts commit ee697121c78a262c456293b10c4f2d4e2873cff0.

The functional association goes away after activating a new image
(issue openbmc/openbmc#3038). The workaround is to keep the reverse
association names the same for the active and functional ones
until the issue is resolved.

Change-Id: I1ce1440e4c612e0efb553695f05db8adea171a77
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/configure.ac b/configure.ac
index 385af26..447fd61 100755
--- a/configure.ac
+++ b/configure.ac
@@ -62,7 +62,7 @@
 AC_DEFINE(ACTIVE_REV_ASSOCIATION, "software_version", [The name of the active's reverse association.])
 
 AC_DEFINE(FUNCTIONAL_FWD_ASSOCIATION, "functional", [The name of the functional forward association.])
-AC_DEFINE(FUNCTIONAL_REV_ASSOCIATION, "functional", [The name of the functional reverse association.])
+AC_DEFINE(FUNCTIONAL_REV_ASSOCIATION, "software_version", [The functional reverse association.])
 
 AC_DEFINE(VERSION_IFACE, "xyz.openbmc_project.Software.Version",
     [The software version manager interface])