drm/tegra: dsi: Add Tegra124 support

The DSI host controller hasn't changed from Tegra114 to Tegra124, but
different characterization parameters may be required.

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/drm.c

@@ -1056,6 +1056,7 @@ static const struct of_device_id host1x_drm_subdevs[] = {
 	{ .compatible = "nvidia,tegra124-dc", },
 	{ .compatible = "nvidia,tegra124-sor", },
 	{ .compatible = "nvidia,tegra124-hdmi", },
+	{ .compatible = "nvidia,tegra124-dsi", },
 	{ .compatible = "nvidia,tegra210-dc", },
 	{ /* sentinel */ }
 };