Update to work with 6.8+ and 6.11 kernels#15

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Kiboneu wants to merge 2 commits intoardangelo:masterfrom

Commits on Apr 22, 2025

Convert to fbdev-ttm (kernel 6.11+) and use drm_format_conv_state (kernel 6.8+)
Kiboneu
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Fix typo: s/drm_ttm_setup/drm_fbdev_ttm_setup
Kiboneu
committed