CRISv32: add device tree support

Add support for booting CRISv32 with a built-in device tree.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>

diff --cc arch/cris/Kconfig
Simple merge

diff --cc arch/cris/Makefile
Simple merge

diff --cc arch/cris/boot/dts/Makefile
Simple merge

diff --cc arch/cris/kernel/Makefile
Simple merge

diff --cc arch/cris/kernel/devicetree.c
Simple merge

diff --cc arch/cris/kernel/setup.c
Simple merge