arm64: dts: ls2081a-rdb: Add DTS for NXP LS2081ARDB

This patch adds support for NXP LS2081ARDB board which has LS2081A SoC.

LS2081A SoC is 40-pin derivative of LS2088A SoC. From functional
perspective both are same. Hence, LS2088a SoC dtsi file is included
from LS2081ARDB dts.

Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
Signed-off-by: Santan Kumar <santan.kumar@nxp.com>
Signed-off-by: Tao Yang <b31903@freescale.com>
Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Signed-off-by: Abhimanyu Saini <abhimanyu.saini@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>