meta-openpower: prep for new override syntax

Change-Id: I5ca16c6fa7bc616bfa9bc41c4f86d32fd92b0287
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-openpower/conf/machine/include/openpower.inc b/meta-openpower/conf/machine/include/openpower.inc
index 34b695b..65d9a8a 100644
--- a/meta-openpower/conf/machine/include/openpower.inc
+++ b/meta-openpower/conf/machine/include/openpower.inc
@@ -10,7 +10,7 @@
         "
 
 # Add OpenPOWER OEM commands handler library
-VIRTUAL-RUNTIME_phosphor-ipmi-providers_append_df-openpower = " \
+VIRTUAL-RUNTIME_phosphor-ipmi-providers:append:df-openpower = " \
     openpower-ipmi-oem \
 "