meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/recipes-phosphor/fans/phosphor-fan-presence-mrw.bb b/meta-phosphor/recipes-phosphor/fans/phosphor-fan-presence-mrw.bb
index 31b7654..aa0e807 100644
--- a/meta-phosphor/recipes-phosphor/fans/phosphor-fan-presence-mrw.bb
+++ b/meta-phosphor/recipes-phosphor/fans/phosphor-fan-presence-mrw.bb
@@ -9,7 +9,7 @@
 DEPENDS = "mrw-native mrw-perl-tools-native"
 PROVIDES += "virtual/phosphor-fan-presence-config"
 
-FILES_${PN} += "${presence_datadir}/config.yaml"
+FILES:${PN} += "${presence_datadir}/config.yaml"
 
 S = "${WORKDIR}"