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>

arch/powerpc/sysdev/dart_iommu.c

@@ -160,7 +160,7 @@ static int dart_build(struct iommu_table *tbl, long index,
 
 	dp = ((unsigned int*)tbl->it_base) + index;
 
-	/* On U3, all memory is contigous, so we can move this
+	/* On U3, all memory is contiguous, so we can move this
 	 * out of the loop.
 	 */
 	l = npages;