Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index f4d0922..dd70738 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -160,7 +160,7 @@
 		                                   &adapter->link_duplex);
 		ecmd->speed = adapter->link_speed;
 
-		/* unfortunatly FULL_DUPLEX != DUPLEX_FULL
+		/* unfortunately FULL_DUPLEX != DUPLEX_FULL
 		 *          and HALF_DUPLEX != DUPLEX_HALF */
 
 		if (adapter->link_duplex == FULL_DUPLEX)