RK3588 8K 2x2 video wall support

Androidsbc - China source manufacturer for RK3588 8K gym fitness advertising display. Featured model WL-RK8K-D4 (Quad HDMI 8K Video Wall Splice Controller): Rockchip RK3588, 4x Cortex-A76 + 4x Cortex-A55, 8nm, active-cooled for sustained 8K multi-output; VPU 8K engine driving four HDMI 2.1 outputs from one decoded 8K source, bezel compensation per tile, 32-c···