[media] s5p-jpeg: Add missing braces around sizeof

Silences the following warning:
WARNING: sizeof *ctx should be sizeof(*ctx)
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/s5p-jpeg/jpeg-core.c

@@ -288,7 +288,7 @@ static int s5p_jpeg_open(struct file *file)
 	struct s5p_jpeg_fmt *out_fmt;
 	int ret = 0;
 
-	ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;