[media] media: mtk-vcodec: remove informative log

Driver is stable. Remove DEBUG definition from driver.

There are debug message in /var/log/messages if DEBUG is defined,
such as:
[MTK_V4L2] level=0 fops_vcodec_open(),170: decoder capability 0
[MTK_V4L2] level=0 fops_vcodec_open(),177: 16000000.vcodec decoder [0]
[MTK_V4L2] level=0 fops_vcodec_release(),200: [0] decoder
Signed-off-by: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
Acked-by: Tiffany Lin <Tiffany.lin@mediatek.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/mtk-vcodec/mtk_vcodec_util.h

@@ -31,7 +31,6 @@ struct mtk_vcodec_dev;
 extern int mtk_v4l2_dbg_level;
 extern bool mtk_vcodec_dbg;
 
-#define DEBUG	1
 
 #if defined(DEBUG)