The STM32MP157 features a Vivante GC400 GPU supported by etnaviv.
Add a DRM entry point for the STM display controller, so mesa
can be used with it.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>