[media] s5p-tv: remove obsolete driver

The s5p-tv driver has been replaced by the exynos drm driver for quite a
long time now. Remove this driver to avoid having duplicate drivers,
of which this one is considered dead code by Samsung.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>