meta-ingrasys: meta-zaius: Cleanup for Yocto override syntax change

Cleanup with
```
convert-overrides.py meta-ingrasys

git grep -l _zaius -- meta-ingrasys \
  | xargs sed -i 's/_zaius/:zaius/'
```

After cleanup
```
$ git grep "_[a-z0-9_/-]*[ :]" -- meta-ingrasys | grep '.bb'
meta-ingrasys/meta-zaius/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend:# compose_list is not defined immediately so don't use :=
```

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: Ib2da97530167688313ac16aedd69168137788c86
diff --git a/meta-ingrasys/meta-zaius/recipes-phosphor/host/phosphor-host-postd_%.bbappend b/meta-ingrasys/meta-zaius/recipes-phosphor/host/phosphor-host-postd_%.bbappend
index a42aa2b..1f12d4d 100644
--- a/meta-ingrasys/meta-zaius/recipes-phosphor/host/phosphor-host-postd_%.bbappend
+++ b/meta-ingrasys/meta-zaius/recipes-phosphor/host/phosphor-host-postd_%.bbappend
@@ -1 +1 @@
-PACKAGECONFIG_append_zaius = " 7seg"
+PACKAGECONFIG:append:zaius = " 7seg"