meta-openpower: prep for new override syntax

Change-Id: I5ca16c6fa7bc616bfa9bc41c4f86d32fd92b0287
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-openpower/recipes-bsp/ffs/ffs.inc b/meta-openpower/recipes-bsp/ffs/ffs.inc
index f144884..f9b6511 100644
--- a/meta-openpower/recipes-bsp/ffs/ffs.inc
+++ b/meta-openpower/recipes-bsp/ffs/ffs.inc
@@ -8,10 +8,10 @@
 
 inherit autotools pkgconfig
 
-ALLOW_EMPTY_${PN} = "1"
+ALLOW_EMPTY:${PN} = "1"
 PACKAGE_BEFORE_PN += "${PN}-ecc ${PN}-deprecated"
 
-FILES_${PN}-ecc = "${bindir}/ecc"
-FILES_${PN}-deprecated = "${bindir}"
+FILES:${PN}-ecc = "${bindir}/ecc"
+FILES:${PN}-deprecated = "${bindir}"
 
 BBCLASSEXTEND = "native nativesdk"