iio: light: us5182d: Fix formatting in kerneldoc function block

Kerneldoc expects attributes/parameters to be in '@*.: ' format.

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

 drivers/iio/light/us5182d.c:457: warning: Function parameter or member 'data' not described in 'us5182d_update_dark_th'
 drivers/iio/light/us5182d.c:457: warning: Function parameter or member 'index' not described in 'us5182d_update_dark_th'
 drivers/iio/light/us5182d.c:479: warning: Function parameter or member 'data' not described in 'us5182d_apply_scale'
 drivers/iio/light/us5182d.c:479: warning: Function parameter or member 'index' not described in 'us5182d_apply_scale'

Cc: Adriana Reus <adriana.reus@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/light/us5182d.c

@@ -446,8 +446,8 @@ static int us5182d_read_raw(struct iio_dev *indio_dev,
 
 /**
  * us5182d_update_dark_th - update Darh_Th registers
- * @data	us5182d_data structure
- * @index	index in us5182d_dark_ths array to use for the updated value
+ * @data:	us5182d_data structure
+ * @index:	index in us5182d_dark_ths array to use for the updated value
  *
  * Function needs to be called with a lock held because it needs two i2c write
  * byte operations as these registers (0x27 0x28) don't work in word mode
@@ -469,8 +469,8 @@ static int us5182d_update_dark_th(struct us5182d_data *data, int index)
 
 /**
  * us5182d_apply_scale - update the ALS scale
- * @data	us5182d_data structure
- * @index	index in us5182d_scales array to use for the updated value
+ * @data:	us5182d_data structure
+ * @index:	index in us5182d_scales array to use for the updated value
  *
  * Function needs to be called with a lock held as we're having more than one
  * i2c operation.