staging: iio: frequency: Remove explicit comparisons

Remove comparisons to 0 or NULL

Signed-off-by: Cristina Moraru <cristina.moraru09@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Cristina Moraru 2015-10-20 22:55:44 +03:00 • committed by Greg Kroah-Hartman
commit 97deb1bc11