Does Tx1 have software support for IMX214 ?

In noticed this

#if IS_ENABLED(CONFIG_SOC_CAMERA_IMX214)
	platform_device_register(&t210ref_imx214_soc_camera_device);
#endif

Does that mean Tx1 has full support for IMX214 image sensor ?

This driver are not support on current release BSP. You need to bring it up again on current release BSP again.