iio: staging: fix typo in ade758_ring.c

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/meter/ade7758_ring.c

@@ -54,7 +54,7 @@ out:
 	return ret;
 }
 
-/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
+/* Whilst this makes a lot of calls to iio_sw_ring functions - it is too device
  * specific to be rolled into the core.
  */
 static irqreturn_t ade7758_trigger_handler(int irq, void *p)