dgpu_com

thank you very much for testing this experimental image! Thanks to your experience, now we know that these "dGPU fixes" do not prevent a "no-dGPU G505S" from working - so we could remove some checks like "if (IS_ENABLED(CONFIG_MULTIPLE_VGA_ADAPTERS)) {" at https://review.coreboot.org/c/coreboot/+/31450/3/src/mainboard/lenovo/g505s/OemCustomize.c for a cleaner code.