Staging: lustre: include: libcfs: removed else before return statement in libcfs_crypto.h

This is a patch to libcfs_crypto.h that fixes warning on unnecessary else before return statement found by checkpatch.pl tool.

Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>