drm/gpuva_mgr: remove unused prev pointer in __drm_gpuva_sm_map()
The prev pointer in __drm_gpuva_sm_map() was used to implement automatic merging of mappings. Since automatic merging did not make its way upstream, remove this leftover. Fixes: e6303f32 ("drm: manager to keep track of GPUs VA mappings") Signed-off-by: NDanilo Krummrich <dakr@redhat.com> Reviewed-by: NDave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230823233119.2891-1-dakr@redhat.com
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