V4L/DVB (7454): cx88: Add user control for color killer

The cx2388x family has a color killer. This patch implements the
V4L2_CID_COLOR_KILLER control for the cx2388x family. By default the
color killer is disabled, as in previous versions of the driver.

Signed-off-by: "Frej Drejhammar <frej.drejhammar@gmail.com>"
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

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

@@ -239,6 +239,18 @@ static struct cx88_ctrl cx8800_ctls[] = {
 		.reg                   = MO_INPUT_FORMAT,
 		.mask                  = 1 << 10,
 		.shift                 = 10,
+	}, {
+		.v = {
+			.id            = V4L2_CID_COLOR_KILLER,
+			.name          = "Color killer",
+			.minimum       = 0,
+			.maximum       = 1,
+			.default_value = 0x0,
+			.type          = V4L2_CTRL_TYPE_BOOLEAN,
+		},
+		.reg                   = MO_INPUT_FORMAT,
+		.mask                  = 1 << 9,
+		.shift                 = 9,
 	}, {
 	/* --- audio --- */
 		.v = {
@@ -295,6 +307,7 @@ const u32 cx88_user_ctrls[] = {
 	V4L2_CID_AUDIO_BALANCE,
 	V4L2_CID_AUDIO_MUTE,
 	V4L2_CID_CHROMA_AGC,
+	V4L2_CID_COLOR_KILLER,
 	0
 };
 EXPORT_SYMBOL(cx88_user_ctrls);