dt-bindings: reset: imx7: Fix the spelling of 'indices'

The correct spelling is 'indices', so fix it accordingly.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Documentation/devicetree/bindings/reset/fsl,imx7-src.txt

@@ -45,6 +45,6 @@ Example:
         };
 
 
-For list of all valid reset indicies see
+For list of all valid reset indices see
 <dt-bindings/reset/imx7-reset.h> for i.MX7 and
 <dt-bindings/reset/imx8mq-reset.h> for i.MX8MQ