drm/msm/dpu: drop extra aspace checks in dpu_formats

drm/msm/dpu: drop extra aspace checks in dpu_formats

The DPU driver isn't expected to be used without an IOMMU. Thus the
aspace will be always present. Not to mention that mdp4/mdp5 drivers
call msm_framebuffer_iova() without such checks, as the whole
msm_framebuffer layer is expected to support both IOMMU and IOMMU-less
configurations.

Drop these useless if (aspace) checks.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/612249/
Link: https://lore.kernel.org/r/20240903-dpu-mode-config-width-v6-6-617e1ecc4b7a@linaro.org