Staging: iio: dummy: Fix blank line warnings

Multiple blank lines should not be used as indicated by checkpatch.pl.
Also, a line should be used after a function/structure declaration.

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --cc drivers/staging/iio/iio_dummy_evgen.c
Simple merge

diff --cc drivers/staging/iio/iio_simple_dummy.c
Simple merge

diff --cc drivers/staging/iio/iio_simple_dummy.h
Simple merge

diff --cc drivers/staging/iio/iio_simple_dummy_buffer.c
Simple merge