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/video/sm501fb.c b/drivers/video/sm501fb.c
index 35370d0..b7dc180 100644
--- a/drivers/video/sm501fb.c
+++ b/drivers/video/sm501fb.c
@@ -411,7 +411,7 @@
 	struct sm501fb_par  *par = info->par;
 	struct sm501fb_info *fbi = par->info;
 	unsigned long pixclock;      /* pixelclock in Hz */
-	unsigned long sm501pixclock; /* pixelclock the 501 can achive in Hz */
+	unsigned long sm501pixclock; /* pixelclock the 501 can achieve in Hz */
 	unsigned int mem_type;
 	unsigned int clock_type;
 	unsigned int head_addr;