SECO ASTRID (SBC-C61): Add Etnaviv support for Vivante GPU
in Linux kernel:
- Enable necessary configurations in defconfig and add appropriate gpu node in device tree.
https://www.kernel.org/doc/Documentation/devicetree/bindings/display/etnaviv/etnaviv-drm.txt
in meta-seco-imx:
- Set up graphics meta-data for etnaviv support
https://gitlab.freedesktop.org/mesa/mesa/-/tree/main/src/gallium/drivers/etnaviv
- Perform test with Flutter application example.