[SOFT-170] Increase number of fan states in CAN msg to include 8 states (#24)

Author: shahhet14

can_messages.asciipb

@@ -637,6 +637,10 @@ msg {
       field_name_2: "fan_2"
       field_name_3: "fan_3"
       field_name_4: "fan_4"
+      field_name_5: "fan_5"
+      field_name_6: "fan_6"
+      field_name_7: "fan_7"
+      field_name_8: "fan_8"
     }
   }
 }