[media] tw2804: Revert ADC Control commit 523a4f7

Case: In AdLink MPG24 there is bt878 exists (it captures one frame of all video
inputs), Video Signal for it one transmits through tw2804 chip, so we can't
control ADC (shut on/off) on tw2804, as some another can use bttv capture way.

Signed-off-by: Volokh Konstantin <volokh84@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/i2c/tw2804.c

@@ -53,7 +53,7 @@ static const u8 global_registers[] = {
 	0x3d, 0x80,
 	0x3e, 0x82,
 	0x3f, 0x82,
-	0x78, 0x0f,
+	0x78, 0x00,
 	0xff, 0xff, /* Terminator (reg 0xff does not exist) */
 };
 
@@ -337,28 +337,13 @@ static int tw2804_s_video_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 	return 0;
 }
 
-static int tw2804_s_stream(struct v4l2_subdev *sd, int enable)
-{
-	struct tw2804 *dec = to_state(sd);
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	u32 reg = read_reg(client, 0x78, 0);
-
-	if (enable == 1)
-		write_reg(client, 0x78, reg & ~(1 << dec->channel), 0);
-	else
-		write_reg(client, 0x78, reg | (1 << dec->channel), 0);
-
-	return 0;
-}
-
 static const struct v4l2_ctrl_ops tw2804_ctrl_ops = {
 	.g_volatile_ctrl = tw2804_g_volatile_ctrl,
 	.s_ctrl = tw2804_s_ctrl,
 };
 
 static const struct v4l2_subdev_video_ops tw2804_video_ops = {
 	.s_routing = tw2804_s_video_routing,
-	.s_stream = tw2804_s_stream,
 };
 
 static const struct v4l2_subdev_core_ops tw2804_core_ops = {