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/power/phosphor-power-systemd-links.bb b/meta-phosphor/recipes-phosphor/power/phosphor-power-systemd-links.bb
index f84ad28..4a5cdad 100644
--- a/meta-phosphor/recipes-phosphor/power/phosphor-power-systemd-links.bb
+++ b/meta-phosphor/recipes-phosphor/power/phosphor-power-systemd-links.bb
@@ -10,6 +10,6 @@
 
 inherit allarch
 
-RDEPENDS_${PN} += "phosphor-power"
+RDEPENDS:${PN} += "phosphor-power"
 
-ALLOW_EMPTY_${PN} = "1"
+ALLOW_EMPTY:${PN} = "1"