iio: adc: rockchip_saradc: add missing MODULE_* data

The module-data is currently missing. This includes the license-information
which makes the driver taint the kernel and miss symbols when compiled as
module.

Fixes: 44d6f2ef94f9 ("iio: adc: add driver for Rockchip saradc")
Signed-off-by: Heiko Stuebner <[e-mail]>
Cc: <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/adc/rockchip_saradc.c

···
 };
 
 module_platform_driver(rockchip_saradc_driver);
+
+MODULE_AUTHOR("Heiko Stuebner <[e-mail]>");
+MODULE_DESCRIPTION("Rockchip SARADC driver");
+MODULE_LICENSE("GPL v2");