Dump: InitiateOffload: Add Unavailable error

The offload may not be available due to various resources
needed for offload is busy or not available in such cases
Unavailable error needs to be returned.

Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
Change-Id: Ibaec718c12ed53ca83977aeb41e10d4cac2fb30f
diff --git a/yaml/xyz/openbmc_project/Dump/Entry.interface.yaml b/yaml/xyz/openbmc_project/Dump/Entry.interface.yaml
index a71cefa..075fe1c 100644
--- a/yaml/xyz/openbmc_project/Dump/Entry.interface.yaml
+++ b/yaml/xyz/openbmc_project/Dump/Entry.interface.yaml
@@ -29,6 +29,7 @@
           - xyz.openbmc_project.Common.File.Error.Write
           - xyz.openbmc_project.Common.Error.InvalidArgument
           - xyz.openbmc_project.Common.Error.NotAllowed
+          - xyz.openbmc_project.Common.Error.Unavailable
 
 properties:
     - name: Size