bmc-ready: include new error codes in interfaces

This will generate the appropriate bindings and ensure the error is
passed back to the caller allowing them to properly handle this type of
error.

Change-Id: I63301d0371d27835417fcba503c32f854f1919bd
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/yaml/xyz/openbmc_project/State/Host.interface.yaml b/yaml/xyz/openbmc_project/State/Host.interface.yaml
index 6495134..006a501 100644
--- a/yaml/xyz/openbmc_project/State/Host.interface.yaml
+++ b/yaml/xyz/openbmc_project/State/Host.interface.yaml
@@ -8,6 +8,8 @@
       description: >
           The desired host transition.  This will be preserved across AC power
           cycles of the BMC.
+      errors:
+          - xyz.openbmc_project.State.Host.Error.BMCNotReady
 
     - name: CurrentHostState
       type: enum[self.HostState]