genpd: rockchip: Add PD_VO entry for rv1126

PD_VO power-domain entry in RV1126 are connected to
- BIU_VO
- VOP
- RGA
- IEP
- DSIHOST

Add an entry for it.

Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20230731110012.2913742-2-jagan@edgeble.ai


Signed-off-by: Heiko Stuebner <heiko@sntech.de>