media: sta2x11: document missing function parameters

As warned:

    drivers/media/pci/sta2x11/sta2x11_vip.c:414: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:442: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:476: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:493: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:524: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:548: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:566: warning: No description found for parameter 'file'
    drivers/media/pci/sta2x11/sta2x11_vip.c:566: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:594: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:651: warning: No description found for parameter 'priv'
    drivers/media/pci/sta2x11/sta2x11_vip.c:717: warning: No description found for parameter 'priv'

Most of the above are for the unused priv argument.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/sta2x11/sta2x11_vip.c

@@ -404,6 +404,7 @@ static const struct v4l2_file_operations vip_fops = {
  * vidioc_querycap - return capabilities of device
  * @file: descriptor of device
  * @cap: contains return values
+ * @priv: unused
  *
  * the capabilities of the device are returned
  *
@@ -429,6 +430,7 @@ static int vidioc_querycap(struct file *file, void *priv,
  * vidioc_s_std - set video standard
  * @file: descriptor of device
  * @std: contains standard to be set
+ * @priv: unused
  *
  * the video standard is set
  *
@@ -466,6 +468,7 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std)
 /**
  * vidioc_g_std - get video standard
  * @file: descriptor of device
+ * @priv: unused
  * @std: contains return values
  *
  * the current video standard is returned
@@ -483,6 +486,7 @@ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
 /**
  * vidioc_querystd - get possible video standards
  * @file: descriptor of device
+ * @priv: unused
  * @std: contains return values
  *
  * all possible video standards are returned
@@ -512,6 +516,7 @@ static int vidioc_enum_input(struct file *file, void *priv,
 /**
  * vidioc_s_input - set input line
  * @file: descriptor of device
+ * @priv: unused
  * @i: new input line number
  *
  * the current active input line is set
@@ -538,6 +543,7 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 /**
  * vidioc_g_input - return input line
  * @file: descriptor of device
+ * @priv: unused
  * @i: returned input line number
  *
  * the current active input line is returned
@@ -554,6 +560,8 @@ static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 
 /**
  * vidioc_enum_fmt_vid_cap - return video capture format
+ * @file: descriptor of device
+ * @priv: unused
  * @f: returned format information
  *
  * returns name and format of video capture
@@ -577,6 +585,7 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 /**
  * vidioc_try_fmt_vid_cap - set video capture format
  * @file: descriptor of device
+ * @priv: unused
  * @f: new format
  *
  * new video format is set which includes width and
@@ -639,6 +648,7 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 /**
  * vidioc_s_fmt_vid_cap - set current video format parameters
  * @file: descriptor of device
+ * @priv: unused
  * @f: returned format information
  *
  * set new capture format
@@ -706,6 +716,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 /**
  * vidioc_g_fmt_vid_cap - get current video format parameters
  * @file: descriptor of device
+ * @priv: unused
  * @f: contains format information
  *
  * returns current video format parameters