Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index bb8ddf0..9b7cdb1 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -826,7 +826,7 @@
 	return status;
 }
 
-/* reinit == restore inital software state */
+/* reinit == restore initial software state */
 static void udc_reinit(struct at91_udc *udc)
 {
 	u32 i;