sh: mach-migor: Delete soc_camera_platform setup.

Migo-R can use ov772x camera driver in Linux 2.6.29.
Therefore, soc_camera_platform setting is no longer needed.
This patch removes it.

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>