panvk: Return VK_ERROR_INCOMPATIBLE_DRIVER for Midgard

Midgard is unsupported after merge of !16915

Signed-off-by: Denis Pauk <pauk.denis@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16991>

src/panfrost/vulkan/panvk_device.c

@@ -327,7 +327,7 @@ panvk_physical_device_init(struct panvk_physical_device *device,
    panfrost_open_device(NULL, fd, &device->pdev);
    fd = -1;
 
-   if (device->pdev.arch < 5) {
+   if (device->pdev.arch <= 5) {
       result = vk_errorf(instance, VK_ERROR_INCOMPATIBLE_DRIVER,
                          "%s not supported",
                          device->pdev.model->name);