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/input/misc/yealink.h b/drivers/input/misc/yealink.h
index 48af0be..1e0f523 100644
--- a/drivers/input/misc/yealink.h
+++ b/drivers/input/misc/yealink.h
@@ -127,7 +127,7 @@
  * yld_status struct.
  */
 
-/* LCD, each segment must be driven seperately.
+/* LCD, each segment must be driven separately.
  *
  * Layout:
  *