Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/isdn/hardware/eicon/divacapi.h b/drivers/isdn/hardware/eicon/divacapi.h
index 9f5b680..e330da0 100644
--- a/drivers/isdn/hardware/eicon/divacapi.h
+++ b/drivers/isdn/hardware/eicon/divacapi.h
@@ -673,7 +673,7 @@
 
 
 /*------------------------------------------------------------------*/
-/* auxilliary states for supplementary services                     */
+/* auxiliary states for supplementary services                     */
 /*------------------------------------------------------------------*/
 
 #define IDLE                0