doc: DocBook: Fix typos 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.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Documentation/DocBook/media/dvb/dvbproperty.xml

@@ -196,7 +196,7 @@ get/set up to 64 properties. The actual meaning of each property is described on
 		<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

@@ -397,7 +397,7 @@ linkend="control" />.</para>
 
       <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>

Documentation/DocBook/media_api.tmpl

@@ -58,7 +58,7 @@ Foundation. A copy of the license is included in the chapter entitled
 	<title>Introduction</title>
 
 	<para>This document covers the Linux Kernel to Userspace API's used by
-		video and radio straming devices, including video cameras,
+		video and radio streaming devices, including video cameras,
 		analog and digital TV receiver cards, AM/FM receiver cards,
 		streaming capture devices.</para>
 	<para>It is divided into four parts.</para>