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/skfp/smt.c b/drivers/net/skfp/smt.c
index 1e1bd0c..08d9432 100644
--- a/drivers/net/skfp/smt.c
+++ b/drivers/net/skfp/smt.c
@@ -219,7 +219,7 @@
 
 	/*
 	 * Only when ring is up we will have a token count. The
-	 * flag is unfortunatly a single instance value. This
+	 * flag is unfortunately a single instance value. This
 	 * doesn't matter now, because we currently have only
 	 * one MAC instance.
 	 */