In some cases, the address of the devicetree, which is obtained
dynamically, may be located in the kernel text area, which leads
to overwrite devicetree by kernel. The patch uses the address for
devicetree, provided by board, if it possible.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>