tree-wide: Assorted spelling fixes

In particular, several occurances of funny versions of 'success',
'unknown', 'therefore', 'acknowledge', 'argument', 'achieve', 'address',
'beginning', 'desirable', 'separate' and 'necessary' are fixed.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Joe Perches <joe@perches.com>
Cc: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/media/video/gspca/ov519.c b/drivers/media/video/gspca/ov519.c
index b4f9657..e5e4c44 100644
--- a/drivers/media/video/gspca/ov519.c
+++ b/drivers/media/video/gspca/ov519.c
@@ -503,7 +503,7 @@
 /*
  * The FX2 chip does not give us a zero length read at end of frame.
  * It does, however, give a short read at the end of a frame, if
- * neccessary, rather than run two frames together.
+ * necessary, rather than run two frames together.
  *
  * By choosing the right bulk transfer size, we are guaranteed to always
  * get a short read for the last read of each frame.  Frame sizes are