media: Documentation: ipu6: remove the dma_ops part from the doc

dma_ops override is not in code anymore, so remove it.

Signed-off-by: Bingbu Cao <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

Documentation/driver-api/media/drivers/ipu6.rst

···
 page table entries for each DMA operation and invalidate the MMU TLB after each
 unmap and free.
 
-.. code-block:: none
-
-    const struct dma_map_ops ipu6_dma_ops = {
-	   .alloc = ipu6_dma_alloc,
-	   .free = ipu6_dma_free,
-	   .mmap = ipu6_dma_mmap,
-	   .map_sg = ipu6_dma_map_sg,
-	   .unmap_sg = ipu6_dma_unmap_sg,
-	   ...
-    };
-
-.. Note:: IPU6 MMU works behind IOMMU so for each IPU6 DMA ops, driver will call
-	  generic PCI DMA ops to ask IOMMU to do the additional mapping if VT-d
-	  enabled.
-
 Firmware file format
 ====================