tree-wide: fix assorted typos all over the place

That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/video4linux/gspca.txt b/Documentation/video4linux/gspca.txt
index 3f61825..6b29555 100644
--- a/Documentation/video4linux/gspca.txt
+++ b/Documentation/video4linux/gspca.txt
@@ -6,7 +6,7 @@
 
 xxxx		vend:prod
 ----
-spca501		0000:0000	MystFromOri Unknow Camera
+spca501		0000:0000	MystFromOri Unknown Camera
 m5602		0402:5602	ALi Video Camera Controller
 spca501		040a:0002	Kodak DVC-325
 spca500		040a:0300	Kodak EZ200