drm: use vzalloc for blob allocation

Use vzalloc instead of vmalloc to initialize blob with zero.
This is required of the base drm_mode_object as well as
drm_property_blob.

Change-Id: Ic1d1ca4daeaa552a20a781df958ad7ecc098bbf0
Signed-off-by: Alan Kwong <akwong@codeaurora.org>
1 file changed