gvt-fixes-2017-09-06

- regression fix for gvt init failure from Jianjun
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170906035924.2225krr6snv2duvq@zhen-hp.sh.intel.com