gpu: host1x: Enable system suspend callbacks

With the previous CDMA stop fix, executing runtime PM ops around
system suspend now makes channel submissions work after system
suspend, so do that.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230901111510.663401-3-cyndis@kapsi.fi

drivers/gpu/host1x/dev.c

@@ -720,7 +720,7 @@ static int __maybe_unused host1x_runtime_resume(struct device *dev)
 static const struct dev_pm_ops host1x_pm_ops = {
 	SET_RUNTIME_PM_OPS(host1x_runtime_suspend, host1x_runtime_resume,
 			   NULL)
-	/* TODO: add system suspend-resume once driver will be ready for that */
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 };
 
 static struct platform_driver tegra_host1x_driver = {