drm/ttm: kill off some members to ttm_validate_buffer
This reorders the list to keep track of what buffers are reserved,
so previous members are always unreserved.
This gets rid of some bookkeeping that's no longer needed,
while simplifying the code some.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
parent
58b4d720
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