[v2] drm/msm/disp/dpu1: set default group ID for CTL.

[Stephen Boyd]

Quoting Kalyan Thota (2021-10-29 05:30:19)
> New required programming in CTL for SC7280. Group ID informs
> HW of which VM owns that CTL. Force this group ID to
> default/disabled until virtualization support is enabled in SW.
>
> Changes in v1:
>  - Fix documentation and add descritpion for the change (Stephen)
>
> Signed-off-by: Kalyan Thota <quic_kalyant at quicinc.com>
> ---

Reviewed-by: Stephen Boyd <swboyd at chromium.org>