drm/msm/dpu: use drm_rect_fp_to_int()
Use the drm_rect_fp_to_int() helper instead of using the hand-written code. Reviewed-by:Abhinav Kumar <quic_abhinavk@quicinc.com> Signed-off-by:
Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Patchwork: https://patchwork.freedesktop.org/patch/621476/ Link: https://lore.kernel.org/r/20241025-dpu-virtual-wide-v6-1-0310fd519765@linaro.org