ARM: dts: rockchip: rename core dtsi from RK1108 to RV1108

Rockchip finally named the SOC as RV1108, so change it
for compatible.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>

[adapt include in rk1108-evb.dts to not introduce errors]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>