[media] media-api-docs: Documented V4L2_TUNER_CAP_HWSEEK_PROG_LIM in G_TUNER docs

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Documentation/DocBook/media/v4l/vidioc-g-tuner.xml

@@ -354,6 +354,12 @@ radio tuners.</entry>
 	<entry>The &VIDIOC-ENUM-FREQ-BANDS; ioctl can be used to enumerate
 	the available frequency bands.</entry>
 	  </row>
+	  <row>
+	<entry><constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant></entry>
+	<entry>0x0800</entry>
+	<entry>The range to search when using the hardware seek functionality
+	is programmable, see &VIDIOC-S-HW-FREQ-SEEK; for details.</entry>
+	  </row>
 	</tbody>
       </tgroup>
     </table>