vkr: set VkResult for vkFreeDescriptorSets

Unlike vkFreeCommandBuffers, vkFreeDescriptorSets has a return value.

Fixes: d6c6fd7 ("vkr: add FREE_OBJECT_ARRAY")
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Yiwei Zhang <zzyiwei@chromium.org>

src/vkr_renderer.c

@@ -2898,6 +2898,8 @@ vkr_dispatch_vkFreeDescriptorSets(struct vn_dispatch_context *dispatch,
 
    FREE_OBJECT_ARRAY(set, descriptor_set, DESCRIPTOR_SET, vkFreeDescriptorSets,
                      pDescriptorSets, descriptorSetCount, descriptorPool);
+
+   args->ret = VK_SUCCESS;
 }
 
 static void