This adds support for videobuf2-dma driver.
This module contains following flavors:
- Contiguous
- Scatter/Gather
Drivers using this can enable 1 of the, or both, depending on their needs.
Due to this, a FILES catch-all is required for the videobuf-dma objects
as depending on requirements, only 1 of them could get generated.
Signed-off-by: Koen Vandeputte <koen.vandeputte@citymesh.com>