fix valgrind ioctl warning.

Initialize local variable to avoid syscall ioctl warning.

Change-Id: I33a90917856018a8527305bb362948ef03bd734c
Origin-Change-Id: I022ebce40b3774a815639a5af34bc7aeb2489936
Signed-off-by: Jin Wei <wei.a.jin@intel.com>
Signed-off-by: Jian Luo <jian.luo@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 62797