staging: fixed spelling error in TODO file for dgnc driver

fixed a missing letter in the TODO file 'unneeded'
Signed-off-by: Scott Matheina <scott@matheina.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/TODO

@@ -4,7 +4,7 @@
   own error message. Adding an extra one is useless.
 * use goto statements for error handling when appropriate
 * there is a lot of unnecessary code in the driver. It was
-  originally a standalone driver. Remove uneeded code.
+  originally a standalone driver. Remove unneeded code.
 
 Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
 Cc: Lidza Louina <lidza.louina@gmail.com>