gpu: host1x: Fix memory access in syncpt request

This patch fixes a bad memory access in syncpoint request code. If
no syncpoints were available, the code accessed unreserved memory
area causing unexpected behaviour.
Signed-off-by: NArto Merilainen <amerilainen@nvidia.com>
Acked-By: NTerje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>

drivers/gpu/host1x/syncpt.c

@@ -40,7 +40,8 @@ static struct host1x_syncpt *_host1x_syncpt_alloc(struct host1x *host,
 
 	for (i = 0; i < host->info->nb_pts && sp->name; i++, sp++)
 		;
-	if (sp->dev)
+
+	if (i >= host->info->nb_pts)
 		return NULL;
 
 	name = kasprintf(GFP_KERNEL, "%02d-%s", sp->id,