virtio-blk: add acct_failed param to virtio_blk_handle_rw_error()

virtio-blk: add acct_failed param to virtio_blk_handle_rw_error()

We add acct_failed param in order to use virtio_blk_handle_rw_error()
also when is not required to call block_acct_failed(). (eg. a discard
operation is failed)

Reviewed-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: Stefan Hajnoczi <[email protected]>
Signed-off-by: Stefano Garzarella <[email protected]>
Message-id: 20190221103314[email protected]
Message-Id: <20190221103314[email protected]>
Signed-off-by: Stefan Hajnoczi <[email protected]>