uboot-phytec

rockchip: Add cpu-info

Add cpu information for rockchip soc.

This would help to print the SoC family number, with
associated temparature, clock and reason for reset etc.

Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>