Correct two non-functional misspellings "overrided".

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
diff --git a/dts/Kconfig b/dts/Kconfig
index 83ba7a6..5fe63f8 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -49,7 +49,7 @@
 	string "Default Device Tree for DT control"
 	help
 	  This option specifies the default Device Tree used for DT control.
-	  It can be overrided from the command line:
+	  It can be overridden from the command line:
 	  $ make DEVICE_TREE=<device-tree-name>
 
 endmenu