[media] docs-rst: cleanup SVG files

The SVG files are larger than the draw dimentions, have long
lines and aren't cleaned. Use inkscape to automatically fix
those issues.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/uapi/v4l/dev-subdev_files/subdev-image-processing-crop.svg

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