staging: iio: tsl2x7x_core: add blank line after struct declaration

Add the missing blank line after struct declaration. Checkpatch found
this issue.

CHECK: Please use a blank line after function/struct/union/enum
declarations
Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/light/tsl2x7x_core.c

@@ -1646,6 +1646,7 @@ static struct attribute *tsl2X7X_ALS_event_attrs[] = {
 	&dev_attr_in_intensity0_thresh_period.attr,
 	NULL,
 };
+
 static struct attribute *tsl2X7X_PRX_event_attrs[] = {
 	&dev_attr_in_proximity0_thresh_period.attr,
 	NULL,