drm/msm/dpu: use standard functions in _dpu_format_populate_plane_sizes_ubwc()

drm/msm/dpu: use standard functions in _dpu_format_populate_plane_sizes_ubwc()

The _dpu_format_populate_plane_sizes_ubwc() used MSM_MEDIA_ALIGN() and
MSM_MEDIA_ROUNDUP(), macros inherited from the previous implementation,
msm_media_info.h. Replace them with the standard Linux macros,
round_up() and DIV_ROUND_UP() respectively.

Patchwork: https://patchwork.freedesktop.org/patch/688182/
Link: https://lore.kernel.org/r/20251114-dpu-formats-v3-12-cae312379d49@oss.qualcomm.com
Tested-by: Luca Weiss <luca.weiss@fairphone.com> # qcm6490-fairphone-fp5
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>