V4L/DVB (12504): soc-camera: prepare soc_camera_platform.c and its users for conversion

soc_camera_platform.c is only used by y SuperH ap325rxa board. This patch
converts soc_camera_platform.c and its users for the soc-camera platform-
device conversion and also extends soc-camera core to handle non-I2C cameras.

Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

include/media/soc_camera.h

@@ -102,6 +102,12 @@ struct soc_camera_link {
 	int i2c_adapter_id;
 	struct i2c_board_info *board_info;
 	const char *module_name;
+	/*
+	 * For non-I2C devices platform platform has to provide methods to
+	 * add a device to the system and to remove
+	 */
+	int (*add_device)(struct soc_camera_link *, struct device *);
+	void (*del_device)(struct soc_camera_link *);
 	/* Optional callbacks to power on or off and reset the sensor */
 	int (*power)(struct device *, int);
 	int (*reset)(struct device *);