meta-ibm: prep for new override syntax

Change-Id: I9116ed7260e369136acb39eec15075db2d4dbeba
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-ibm/conf/machine/swift.conf b/meta-ibm/conf/machine/swift.conf
index e8d6dcc..f4f2413 100644
--- a/meta-ibm/conf/machine/swift.conf
+++ b/meta-ibm/conf/machine/swift.conf
@@ -18,5 +18,5 @@
 BMC_RW_SIZE = "0x2000000"
 
 # Inhibit swift-led-manager-config-native
-PREFERRED_PROVIDER_virtual/phosphor-led-manager-config-native_df-mrw = \
+PREFERRED_PROVIDER_virtual/phosphor-led-manager-config-native:df-mrw = \
     "swift-led-manager-config-native"