When error recovery fails, just fail the command.  Attempting error recovery again results in a panic as the ccb used for error recovery is already in use.
When error recovery fails, just fail the command.  Attempting error
recovery again results in a panic as the ccb used for error recovery is
already in use.

ok dlg@, tested by benno@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars