Interfaces for IPZ VPD

This commit adds interface YAMLs to provide
access to IPZ VPD (an IBM VPD format).

The interfaces are contained within the
com.ibm.ipzvpd namespace.

The commit also adds a configure option to
enable compiling these interfaces (--enable-ibm-dbus-interfaces)

Signed-off-by: Santosh Puranik <santosh.puranik@in.ibm.com>
Change-Id: I4832bc6b6f1e9f7e4235757d69f018b17cb896b1
diff --git a/configure.ac b/configure.ac
index a2bfc73..bb6c8e4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,6 +29,13 @@
        YAML_DIRS="$YAML_DIRS org/open_power"
 ])
 
+AC_ARG_ENABLE([ibm_dbus_interfaces],
+    AS_HELP_STRING([--enable-ibm-dbus-interfaces], [Enable the IBM D-Bus interfaces]))
+
+AS_IF([test "x$enable_ibm_dbus_interfaces" == "xyes"], [
+       YAML_DIRS="$YAML_DIRS com/ibm"
+])
+
 AM_CONDITIONAL([WANT_LIBPHOSPHOR_DBUS], [test "x$enable_libphosphor_dbus" != "xno"])
 
 AS_IF([test "x$enable_libphosphor_dbus" != "xno"], [