drm/msm/dpu: split dpu_format_populate_layout

Split dpu_format_populate_layout() into addess-related and
pitch/format-related parts.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com> # sc7280
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/612244/
Link: https://lore.kernel.org/r/20240903-dpu-mode-config-width-v6-10-617e1ecc4b7a@linaro.org