bochs_fbdev.c is almost empty now.  Move the remaining framebuffer bits
over to bochs_kms.c.  Pure code motion. No functional change.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20190111053752.4004-17-kraxel@redhat.com