iio: sx9310: Update copyright

Fixes wrong copyright year.
Signed-off-by: Daniel Campello <campello@chromium.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/proximity/sx9310.c

@@ -6,8 +6,8 @@
  * Based on SX9500 driver and Semtech driver using the input framework
  * <https://my.syncplicity.com/share/teouwsim8niiaud/
  *          linux-driver-SX9310_NoSmartHSensing>.
- * Reworked April 2019 by Evan Green <evgreen@chromium.org>
- * and January 2020 by Daniel Campello <campello@chromium.org>
+ * Reworked in April 2019 by Evan Green <evgreen@chromium.org>
+ * and in January 2020 by Daniel Campello <campello@chromium.org>.
  */
 
 #include <linux/acpi.h>