CRIS v32: add ARTPEC-3 and P1343 device trees

Add a device tree for the Axis P1343 with the ARTPEC-3 SoC and on-board
LEDs and RTC.

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