Input: surface3_spi - fix naming issue with 'surface3_spi_get_gpio_config's header

Fixes the following W=1 kernel build warning(s):

 drivers/input/touchscreen/surface3_spi.c: In function ‘surface3_spi_process_touch’:
 drivers/input/touchscreen/surface3_spi.c:97:6: warning: variable ‘timestamp’ set but not used [-Wunused-but-set-variable]
 drivers/input/touchscreen/surface3_spi.c:225: warning: Function parameter or member 'data' not described in 'surface3_spi_get_gpio_config'
 drivers/input/touchscreen/surface3_spi.c:225: warning: Excess function parameter 'ts' description in 'surface3_spi_get_gpio_config'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-11-lee.jones@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/surface3_spi.c

@@ -219,7 +219,7 @@ static void surface3_spi_power(struct surface3_ts_data *data, bool on)
 /**
  * surface3_spi_get_gpio_config - Get GPIO config from ACPI/DT
  *
- * @ts: surface3_spi_ts_data pointer
+ * @data: surface3_spi_ts_data pointer
  */
 static int surface3_spi_get_gpio_config(struct surface3_ts_data *data)
 {