[VOL-5480] update correct rw-core image path

Change-Id: I7355ba8c8ab2dca9a6c271cfc988c5933c05e436
Signed-off-by: Akash Reddy Kankanala <akash.kankanala@radisys.com>
diff --git a/voltha/values.yaml b/voltha/values.yaml
index 4d7ab25..1514bfb 100644
--- a/voltha/values.yaml
+++ b/voltha/values.yaml
@@ -123,7 +123,7 @@
   rw_core:
     registry: '{{ .Values.global.image_registry }}'
     repository: '{{ .Values.global.image_org }}voltha-rw-core'
-    tag: '{{- if hasKey .Values.global "image_tag" }}{{- if .Values.global.image_tag }}{{ .Values.global.rw_core.image_tag }}{{- else }}{{ .Chart.AppVersion }}{{- end }}{{- else }}{{ .Chart.AppVersion }}{{- end }}'
+    tag: '{{- if hasKey .Values.global "image_tag" }}{{- if .Values.global.image_tag }}{{ .Values.global.image_tag }}{{- else }}{{ .Chart.AppVersion }}{{- end }}{{- else }}{{ .Chart.AppVersion }}{{- end }}'
     pullPolicy: '{{ .Values.global.image_pullPolicy }}'
 
 ingress: