fbdev: efifb: bind to efi-framebuffer

Instead of creating a dummy device, we now bind to the efi-fb device
which is provided by x86 initialization code.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Link: http://lkml.kernel.org/r/1375445127-15480-8-git-send-email-dh.herrmann@gmail.com


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>