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>

drivers/net/tehuti.c

@@ -1857,7 +1857,7 @@ static void bdx_tx_push_desc(struct bdx_priv *priv, void *data, int size)
  * @data - desc's data
  * @size - desc's size
  *
- * NOTE: this func does check for available space and, if neccessary, waits for
+ * NOTE: this func does check for available space and, if necessary, waits for
  *   NIC to read existing data before writing new one.
  */
 static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size)