Dell C6400 Series updates (#2135)

* Update Dell C Series

* Update PowerEdge-C6420.yaml

* Update PowerEdge-C6400.yaml

* Update PowerEdge-C6400.yaml

Fixed indentation.

* Update PowerEdge-C6400.yaml

* Fixed PR check

---------

Co-authored-by: Daniel W. Anner <daniel.anner@danstechsupport.com>
Co-authored-by: Harry <Harry@cadby.co.uk>

device-types/Dell/PowerEdge-C6400.yaml

@@ -2,8 +2,23 @@
 manufacturer: Dell
 model: PowerEdge C6400
 slug: dell-poweredge-c6400
-u_height: 2
-is_full_depth: false
+u_height: 2.0
+is_full_depth: true
+subdevice_role: parent
+weight: 45
+weight_unit: kg
+airflow: front-to-rear
+comments: |
+  [Dell C6420 Spec Sheet](https://i.dell.com/sites/csdocuments/Product_Docs/en/poweredge-c6400-c6420-technical-guide.pdf)
+device-bays:
+  - name: '1'
+    label: Sled 1
+  - name: '2'
+    label: Sled 2
+  - name: '3'
+    label: Sled 3
+  - name: '4'
+    label: Sled 4
 module-bays:
   - name: Power 1
     position: '1'

device-types/Dell/PowerEdge-C6420.yaml

@@ -2,15 +2,14 @@
 manufacturer: Dell
 model: PowerEdge C6420
 slug: dell-poweredge-c6420
-u_height: 2
-is_full_depth: false
+u_height: 0
+is_full_depth: true
+subdevice_role: child
+airflow: front-to-rear
+weight: 5
+weight_unit: kg
 comments: |
-  [Dell C6420 Spec Sheet](https://www.delltechnologies.com/asset/en-us/products/servers/technical-support/dell-emc-poweredge-c6520-spec-sheet.pdf)
-module-bays:
-  - name: Power 1
-    position: '1'
-  - name: Power 2
-    position: '2'
+  [Dell C6420 Spec Sheet](https://i.dell.com/sites/csdocuments/Product_Docs/en/poweredge-c6400-c6420-technical-guide.pdf)
 interfaces:
   - name: Gig-E 1
     type: 1000base-t