[media] go7007: convert to the control framework and remove obsolete JPEGCOMP support

Just add a read-only V4L2_CID_JPEG_ACTIVE_MARKER control to replace
the JPEGCOMP support.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/media/go7007/go7007-driver.c

@@ -268,12 +268,17 @@ int go7007_register_encoder(struct go7007 *go, unsigned num_i2c_devs)
 	ret = go7007_init_encoder(go);
 	mutex_unlock(&go->hw_lock);
 	if (ret < 0)
-		return -1;
+		return ret;
+
+	ret = go7007_v4l2_ctrl_init(go);
+	if (ret < 0)
+		return ret;
 
 	if (!go->i2c_adapter_online &&
 			go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
-		if (go7007_i2c_init(go) < 0)
-			return -1;
+		ret = go7007_i2c_init(go);
+		if (ret < 0)
+			return ret;
 		go->i2c_adapter_online = 1;
 	}
 	if (go->i2c_adapter_online) {

drivers/staging/media/go7007/go7007-priv.h

@@ -22,6 +22,7 @@
  */
 
 #include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
 
 struct go7007;
 
@@ -182,6 +183,7 @@ struct go7007 {
 	void *boot_fw;
 	unsigned boot_fw_len;
 	struct v4l2_device v4l2_dev;
+	struct v4l2_ctrl_handler hdl;
 	enum { STATUS_INIT, STATUS_ONLINE, STATUS_SHUTDOWN } status;
 	spinlock_t spinlock;
 	struct mutex hw_lock;
@@ -296,6 +298,7 @@ int go7007_i2c_remove(struct go7007 *go);
 
 /* go7007-v4l2.c */
 int go7007_v4l2_init(struct go7007 *go);
+int go7007_v4l2_ctrl_init(struct go7007 *go);
 void go7007_v4l2_remove(struct go7007 *go);
 
 /* snd-go7007.c */