Refuse to run if framebuffer or dri devices are present

Merged Jocelyn Falempe requested to merge jocelyn/xf86-video-vesa:fix_simpledrm_uefi into master

The simpledrm driver, introduced in kernel 5.14, can replace efifb to provide the efi framebuffer.

This fixes a bug on Fedora 36 (first version to use simpledrm driver):

v2: check for framebuffer or dri devices instead of efi framebuffer interface.

Signed-off-by: Jocelyn Falempe

Edited by Jocelyn Falempe

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