drivers: video: tidss: Kconfig: Configs to enable TIDSS at SPL

To enable tidss display driver only at SPL stage, add necessary config,
CONFIG_SPL_VIDEO_TIDSS.

Signed-off-by: Nikhil M Jain <n-jain1@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Devarsh Thakkar <devarsht@ti.com>