V4L/DVB (5110): Keep the previous tvnorm default for cx88 and cx88-blackbird

The video_ioctl2 conversion replaced the default from NTSC to PAL_BG.
This broke cx88-blackbird. Probably, there are some badness at this
driver, not doing all required stuff to change video standard.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx88/cx88-blackbird.c

@@ -1233,7 +1233,7 @@ static struct video_device cx8802_mpeg_template =
 	.vidioc_s_tuner       = vidioc_s_tuner,
 	.vidioc_s_std         = vidioc_s_std,
 	.tvnorms              = CX88_NORMS,
-	.current_norm         = V4L2_STD_PAL_BG,
+       .current_norm         = V4L2_STD_NTSC_M,
 };
 
 /* ------------------------------------------------------------------ */

drivers/media/video/cx88/cx88-video.c

@@ -1657,7 +1657,7 @@ static struct video_device cx8800_video_template =
 	.vidioc_g_frequency   = vidioc_g_frequency,
 	.vidioc_s_frequency   = vidioc_s_frequency,
 	.tvnorms              = CX88_NORMS,
-	.current_norm         = V4L2_STD_PAL_BG,
+       .current_norm         = V4L2_STD_NTSC_M,
 };
 
 static const struct file_operations radio_fops =