Remove area from comments, and add, if missing

mcu-pow-washer.yaml

@@ -2,12 +2,14 @@
 substitutions:
   device: pow-washer
   name: Washer POW
-  comment: Washroom
+  comment: 
+  area: Washroom
   update_interval: 10s
 
 esphome:
   name: mcu-${device}
   friendly_name: ${name}
+  area: ${area}
   comment: ${comment}
 
 esp32: