Please review and fix documentation regarding output/capture planes on encoder/decoder

In the comments/documentation inside v4l2_nv_extensions.h the memory types of the V4L2 Video Decoder is specified inside this table:

* ### Supported Memory Types
* :------------------: | :----------: | :-----------:
* V4L2_MEMORY_MMAP     | Y            | Y
* V4L2_MEMORY_DMABUF   | N            | N
* V4L2_MEMORY_USERPTR  | N            | N

This table implicates that the memory type V4L2_MEMORY_DMABUF for the capture plane is not possible/allowed.
Yet the sample code for 00_video_decode explicitly sets up the capture plane to use DMABUF:
ctx->capture_plane_mem_type = V4L2_MEMORY_DMABUF;
inside set_defaults().
I wonder if the documentation has been outdated for a long time. Please update it to include the DMABUF for the decoder capture plane, and check if there are similar oversights. Thanks!

Thanks for pointing it out. We will correct it.