media: doc: dev-encoder: Fixup type for ENUM_FRAMEINTERVALS

The doc mistakently mentions v4l2_frmsizeenum as the struct type passed
to VIDIOC_ENUM_FRAMEINTERVALS, while it's actually v4l2_frmivalenum that
should be used.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Documentation/userspace-api/media/v4l/dev-encoder.rst

@@ -115,8 +115,8 @@ Querying Capabilities
 
 4. The client may use :c:func:`VIDIOC_ENUM_FRAMEINTERVALS` to detect supported
    frame intervals for a given format and resolution, passing the desired pixel
-   format in :c:type:`v4l2_frmsizeenum` ``pixel_format`` and the resolution
-   in :c:type:`v4l2_frmsizeenum` ``width`` and :c:type:`v4l2_frmsizeenum`
+   format in :c:type:`v4l2_frmivalenum` ``pixel_format`` and the resolution
+   in :c:type:`v4l2_frmivalenum` ``width`` and :c:type:`v4l2_frmivalenum`
    ``height``.
 
    * Values returned by :c:func:`VIDIOC_ENUM_FRAMEINTERVALS` for a coded pixel