ARM: dts: rockchip: Add support for RV1103B

Add the initial RV1103B devicetree.

Based on the 5.10 Rockchip vendor kernel.

Signed-off-by: Fabio Estevam <festevam@nabladev.com>
Link: https://patch.msgid.link/20260313131058.708361-2-festevam@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: Fabio Estevam