[media] soc-camera: increase the length of clk_name on soc_of_bind()

Since in soc_of_bind() it may use the of node's full name as the clk_name,
and this full name may be longer than 32 characters, take at91 i2c sensor
as an example, length is 34 bytes:
   /ahb/apb/i2c@f8028000/camera@0x30

So this patch increase the clk_name[] array size to 64. It seems big
enough so far.
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/soc_camera/soc_camera.c

@@ -1631,7 +1631,7 @@ static int soc_of_bind(struct soc_camera_host *ici,
 	struct soc_camera_async_client *sasc;
 	struct soc_of_info *info;
 	struct i2c_client *client;
-	char clk_name[V4L2_SUBDEV_NAME_SIZE];
+	char clk_name[V4L2_SUBDEV_NAME_SIZE + 32];
 	int ret;
 
 	/* allocate a new subdev and add match info to it */