device/device_util.c: Fix wording in comment of `new_resource()`

Change-Id: Ieb0d5de37870a359f3a7ea1543640e26f86c1684
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/5952
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/device/device_util.c

@@ -462,7 +462,7 @@ struct resource *probe_resource(device_t dev, unsigned index)
  * See if a resource structure already exists for a given index and if not
  * allocate one.
  *
- * Then initialize the initialize the resource to default values.
+ * Then initialize the resource to default values.
  *
  * @param dev The device to find the resource on.
  * @param index The index of the resource on the device.