doc: update some dm parameter

below parameters are obsolete, reserve the code for potential use
but remove the description in document.

amd_hostbridge
virtio-ipu
virtio-hyper_dmabuf
virtio-audio

Tracked-On: #6690
Signed-off-by: hangliu1 <hang1.liu@linux.intel.com>

doc/user-guides/acrn-dm-parameters.rst

@@ -379,9 +379,6 @@ arguments used for configuration.  Here is a table describing these emulated dev
        Packet Interface device (for CD-ROM emulation). ``ahci-cd`` supports the same
        parameters than ``ahci``.
 
-   * - ``amd_hostbridge``
-     - Virtualized PCI AMD hostbridge
-
    * - ``hostbridge``
      - Virtualized PCI hostbridge, a hardware bridge between the CPU's
        high-speed system local bus and the Peripheral Component Interconnect
@@ -414,17 +411,9 @@ arguments used for configuration.  Here is a table describing these emulated dev
        n,virtio-input,/dev/input/eventX[,serial]``. ``serial`` is an optional
        string used as the unique identification code of guest virtio input device.
 
-   * - ``virtio-ipu``
-     - Virtio image processing unit (IPU), it is used to connect
-       camera device to system, to convert the raw Bayer image into YUV domain.
-
    * - ``virtio-console``
      - Virtio console type device for data input and output.
 
-   * - ``virtio-hyper_dmabuf``
-     - Virtio device that allows sharing data buffers between VMs using a
-       dmabuf-like interface.
-
    * - ``virtio-heci``
      - Virtio Host Embedded Controller Interface, parameters should be appended
        with the format ``<bus>:<device>:<function>,d<0~8>``. You can find the BDF
@@ -467,9 +456,6 @@ arguments used for configuration.  Here is a table describing these emulated dev
        ``physical_rpmb`` to specify RPMB in physical mode,
        otherwise RPMB is in simulated mode.
 
-   * - ``virtio-audio``
-     - Virtio audio type device
-
    * - ``virtio-net``
      - Virtio network type device, parameter should be appended with the format:
        ``virtio-net,<device_type>=<name>[,vhost][,mac=<XX:XX:XX:XX:XX:XX> | mac_seed=<seed_string>]``.