We don't want to encourage the device_type usage.  It isn't used in
the code, so we can simply remove it from the dts files.
Suggested-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>