media: fix usage of whitespaces and on indentation

On several places, whitespaces are being used for indentation,
or even at the end of the line.

Fix them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/cx18/cx18-streams.c

@@ -116,7 +116,7 @@ static int cx18_prepare_buffer(struct videobuf_queue *q,
 	unsigned int width, unsigned int height,
 	enum v4l2_field field)
 {
-        struct cx18 *cx = s->cx;
+	struct cx18 *cx = s->cx;
 	int rc = 0;
 
 	/* check settings */