staging: iio: trigger: add blank lines after declarations

This fixes the following checkpatch.pl warning:
WARNING: Missing a blank line after declarations.

Signed-off-by: Catalina Mocanu <catalina.mocanu@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
Simple merge