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/scsi/a100u2w.c b/drivers/scsi/a100u2w.c
index 208d6df..ff5716d 100644
--- a/drivers/scsi/a100u2w.c
+++ b/drivers/scsi/a100u2w.c
@@ -492,7 +492,7 @@
  *	init_orchid		-	initialise the host adapter
  *	@host:host adapter to initialise
  *
- *	Initialise the controller and if neccessary load the firmware.
+ *	Initialise the controller and if necessary load the firmware.
  *
  *	Returns -1 if the initialisation fails.
  */