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/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index 0ca5893..99459db 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -476,7 +476,7 @@
 		 * The driver does not support the IV/EIV generation
 		 * in hardware. However it doesn't support the IV/EIV
 		 * inside the ieee80211 frame either, but requires it
-		 * to be provided seperately for the descriptor.
+		 * to be provided separately for the descriptor.
 		 * rt2x00lib will cut the IV/EIV data out of all frames
 		 * given to us by mac80211, but we must tell mac80211
 		 * to generate the IV/EIV data.