m68k: defconfig: Update virt_defconfig for v6.6-rc3

  - Enable CONFIG_DRM_FBDEV_EMULATION and CONFIG_FB_DEVICE (no longer
    auto-enabled since commit bb6c4507 ("drm: fix up fbdev
    Kconfig defaults")),
  - Drop CONFIG_FRAMEBUFFER_CONSOLE=y (auto-enabled since commit
    bb6c4507

 ("drm: fix up fbdev Kconfig defaults")).

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/6f30b86b83b972e9902b62295f397a20512d5507.1695977960.git.geert@linux-m68k.org