[SEM-703] Use open source GPU driver

[Jipolie01]

Description

This PR creates a configuration in the devicetree that allows for the use of the open source vivante driver instead of galore. This driver supports eglfs rendering which will help with the tearing issues that were having on the animations.

jedi-cookbook: : https://github.com/Ultimaker/jedi-cookbook/pull/294
qt5: Ultimaker/qt5#21
okuda: https://github.com/Ultimaker/okuda/pull/1207

How has this been tested

Ran package on printer in combination with other PR's for SEM-703 on F4

• Test on S6/S8/F4
• Go throughthe menu's for S6 and F4 to check that there is no immediate smoke

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[Copilot]

Pull request overview

This PR configures the system to use the open-source Vivante (etnaviv) GPU driver instead of the proprietary Galcore driver to address animation tearing issues. The changes enable eglfs rendering support through device tree configuration and kernel settings.

Key Changes

• Device tree configuration modified to use only the 3D GPU core (GCNanoUltra) to avoid memory crashes
• Kernel configuration switched from modular etnaviv to built-in, and removed proprietary MXC_GPU_VIV driver

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
dts/ultimainboard5-lvds.dtsi	Overwrites GPU node to configure Vivante driver with 3D-only core and creates GPU subsystem
configs/sx8m_defconfig	Enables etnaviv driver as built-in and removes proprietary GPU driver

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[robinmdh]

Nice explanation in the device tree!