GPU-DRM: Replace a kzalloc() call by kcalloc() in drm_legacy_addbufs_agp()

The script "checkpatch.pl" can point information out like the following.

WARNING: Prefer kcalloc over kzalloc with multiply

Thus fix the affected source code place.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/606c22f3-5da5-2e84-783d-bfe5289b4a01@users.sourceforge.net
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index 8a31dac..36dd685 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -755,7 +755,7 @@
 		return -EINVAL;
 	}
 
-	entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
+	entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
 	if (!entry->buflist) {
 		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);