Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index eb7958c..a7b083f 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -812,7 +812,7 @@
 }
 
 /*
- * Here we define a transistion notifier so that we can update all of our
+ * Here we define a transition notifier so that we can update all of our
  * ports' baud rate when the peripheral clock changes.
  */
 static int sci_notifier(struct notifier_block *self,