Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/Documentation/DocBook/v4l/dev-subdev.xml b/Documentation/DocBook/v4l/dev-subdev.xml
index 21caff6..05c8fef 100644
--- a/Documentation/DocBook/v4l/dev-subdev.xml
+++ b/Documentation/DocBook/v4l/dev-subdev.xml
@@ -90,7 +90,7 @@
     processing hardware.</para>
 
     <figure id="pipeline-scaling">
-      <title>Image Format Negotation on Pipelines</title>
+      <title>Image Format Negotiation on Pipelines</title>
       <mediaobject>
 	<imageobject>
 	  <imagedata fileref="pipeline.pdf" format="PS" />