config: Add Balcones and Waterloo

Add Balcones and Waterloo configuration, Balcones IM (0x60004000).
Balcones is an IBM chassis and Waterloo is an IBM backplane.

Test:
  Built an image and verified balcones.json and waterloo.json
  exist in the image.

Change-Id: I013a6f69ac9f48ac71d58b4655596171896ab51e
Signed-off-by: Faisal Awada <faisal@us.ibm.com>
diff --git a/schemas/ibm.json b/schemas/ibm.json
index dd3ec89..184e299 100644
--- a/schemas/ibm.json
+++ b/schemas/ibm.json
@@ -48,6 +48,7 @@
                     "type": "array",
                     "items": {
                         "enum": [
+                            "ibm,balcones",
                             "ibm,blueridge",
                             "ibm,blueridge-1s4u",
                             "ibm,blueridge-2u",