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/net/stmmac/gmac.h b/drivers/net/stmmac/gmac.h
index 684a363..2e82d6c 100644
--- a/drivers/net/stmmac/gmac.h
+++ b/drivers/net/stmmac/gmac.h
@@ -154,14 +154,14 @@
 #define DMA_CONTROL_DT		0x04000000 /* Disable Drop TCP/IP csum error */
 #define DMA_CONTROL_RSF		0x02000000 /* Receive Store and Forward */
 #define DMA_CONTROL_DFF		0x01000000 /* Disaable flushing */
-/* Theshold for Activating the FC */
+/* Threshold for Activating the FC */
 enum rfa {
 	act_full_minus_1 = 0x00800000,
 	act_full_minus_2 = 0x00800200,
 	act_full_minus_3 = 0x00800400,
 	act_full_minus_4 = 0x00800600,
 };
-/* Theshold for Deactivating the FC */
+/* Threshold for Deactivating the FC */
 enum rfd {
 	deac_full_minus_1 = 0x00400000,
 	deac_full_minus_2 = 0x00400800,