[PATCH V2] drm/mgag200: Invalidate page tables when pinning a BO

When a BO gets pinned the placement may get changed. If the memory is mapped into user space and user space has already accessed the mapped range the page tables are set up but now point to the wrong memory. Set bo.mdev->dev_mapping in mgag200_bo_create() to make sure that ttm_bo_unmap_virtual()

[PATCH V2] drm/mgag200: Invalidate page tables when pinning a BO

When a BO gets pinned the placement may get changed. If the memory is mapped into user space and user space has already accessed the mapped range the page tables are set up but now point to the wrong memory. Set bo.mdev-dev_mapping in mgag200_bo_create() to make sure that ttm_bo_unmap_virtual()