Staging: iio: Documentation/lis3l02dqbuffersimple.c: duplicated include

drivers/staging/iio/Documentation/lis3l02dqbuffersimple.c: dirent.h is included more than once.

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>