radv: Fix unused label warning on Windows

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6162>

src/amd/vulkan/radv_device.c

@@ -693,7 +693,9 @@ radv_physical_device_try_create(struct radv_instance *instance, drmDevicePtr drm
 
 fail_disk_cache:
    disk_cache_destroy(device->disk_cache);
+#ifdef ENABLE_SHADER_CACHE
 fail_wsi:
+#endif
    device->ws->destroy(device->ws);
 fail_base:
    vk_physical_device_finish(&device->vk);