meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass b/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass
index f30f0c0..479619c 100644
--- a/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass
+++ b/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass
@@ -1,18 +1,18 @@
 # eMMC-specific configuration for the phosphor-manager-software package
 
-PACKAGECONFIG_append = " mmc_layout"
+PACKAGECONFIG:append = " mmc_layout"
 
 EXTRA_OEMESON += "-Dactive-bmc-max-allowed=2"
 EXTRA_OEMESON += "-Dmedia-dir='/media'"
 EXTRA_OEMESON += "-Doptional-images='image-hostfw'"
 
-RDEPENDS_phosphor-software-manager-updater-mmc += " \
+RDEPENDS:phosphor-software-manager-updater-mmc += " \
     gptfdisk \
     parted \
     zstd \
 "
 
-SYSTEMD_SERVICE_phosphor-software-manager-updater-mmc += " \
+SYSTEMD_SERVICE:phosphor-software-manager-updater-mmc += " \
     obmc-flash-mmc@.service \
     obmc-flash-mmc-remove@.service \
     obmc-flash-mmc-setprimary@.service \