ARM: shmobile: r8a7778: camera-rcar header cleanup

<linux/platform_data/camera-rcar.h> is needed on BockW,
not setup-r8a7778.c

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>