[media] DocBook: Fix typo in xml and template file

Fix spelling typo under Documentation/DocBook/media.
It is because these files are NOT generated by "make htmldocs",
I have to fix the files.

[[e-mail]: fix a merge conflict]
Signed-off-by: Masanari Iida <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

Documentation/DocBook/media/dvb/dvbproperty.xml

···
 		<para>1)For satellital delivery systems, it is measured in kHz.
 			For the other ones, it is measured in Hz.</para>
 		<para>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
-			E.g. a valid frequncy could be 474143 kHz. The stepping is bound to the bandwidth of
+			E.g. a valid frequency could be 474143 kHz. The stepping is bound to the bandwidth of
 			the channel which is 6MHz.</para>
 
 		<para>3)As in ISDB-Tsb the channel consists of only one or three segments the

Documentation/DocBook/media/v4l/compat.xml

···
 
       <para>The <structfield>depth</structfield> (average number of
 bits per pixel) of a video image is implied by the selected image
-format. V4L2 does not explicitely provide such information assuming
+format. V4L2 does not explicitly provide such information assuming
 applications recognizing the format are aware of the image depth and
 others need not know. The <structfield>palette</structfield> field
 moved into the &v4l2-pix-format;:<informaltable>