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 <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/iio/light/tsl2x7x_core.c

···
 	&dev_attr_in_intensity0_thresh_period.attr,
 	NULL,
 };
+
 static struct attribute *tsl2X7X_PRX_event_attrs[] = {
 	&dev_attr_in_proximity0_thresh_period.attr,
 	NULL,