drm/msm/dpu: Drop extraneous return in dpu_crtc_reassign_planes()

Drop extra return at the end of dpu_crtc_reassign_planes()

Fixes: 774bcfb7 ("drm/msm/dpu: add support for virtual planes")
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/631565/
Link: https://lore.kernel.org/r/20250108-virtual-planes-fixes-v1-2-420cb36df94a@quicinc.com


Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>