qapi-schema: add ErrorClass enum

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# QAPI Schema

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# @ErrorClass

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# QEMU error classes

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# @GenericError: this is used for errors that don't require a specific error

#                class. This should be the default case for most errors

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# @CommandNotFound: the requested command has not been found

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# @DeviceEncrypted: the requested operation can't be fulfilled because the

#                   selected device is encrypted

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# @DeviceNotActive: a device has failed to be become active

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# @DeviceNotFound: the requested device has not been found

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# @KVMMissingCap: the requested operation can't be fulfilled because a

#                 required KVM capability is missing

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# @MigrationExpected: the requested operation can't be fulfilled because a

#                     migration process is expected

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# Since: 1.2

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{ 'enum': 'ErrorClass',

  'data': [ 'GenericError', 'CommandNotFound', 'DeviceEncrypted',

            'DeviceNotActive', 'DeviceNotFound', 'KVMMissingCap',

            'MigrationExpected' ] }

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# @NameInfo:

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