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/drivers/char/n_r3964.c b/drivers/char/n_r3964.c
index 6934025..c1d8b54 100644
--- a/drivers/char/n_r3964.c
+++ b/drivers/char/n_r3964.c
@@ -602,7 +602,7 @@
 		}
 		break;
 	case R3964_WAIT_FOR_RX_REPEAT:
-		/* FALLTROUGH */
+		/* FALLTHROUGH */
 	case R3964_IDLE:
 		if (c == STX) {
 			/* Prevent rx_queue from overflow: */