meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/recipes-extended/sdbusplus/python3-sdbus++_git.bb b/meta-phosphor/recipes-extended/sdbusplus/python3-sdbus++_git.bb
index 6557a1d..e5dbf4b 100644
--- a/meta-phosphor/recipes-extended/sdbusplus/python3-sdbus++_git.bb
+++ b/meta-phosphor/recipes-extended/sdbusplus/python3-sdbus++_git.bb
@@ -22,7 +22,7 @@
     ${PYTHON_PN}-pyyaml-native \
     "
 
-RDEPENDS_${PN} += " \
+RDEPENDS:${PN} += " \
     ${PYTHON_PN}-inflection \
     ${PYTHON_PN}-mako \
     ${PYTHON_PN}-pyyaml \