drm/ttm/tests: Remove checks from ttm_pool_free_no_dma_alloc

drm/ttm/tests: Remove checks from ttm_pool_free_no_dma_alloc

On !x86, the pool type is never initialised, and the pages are freed
back to the system.

The test broke on the list_lru rewrite, but I'm not sure how that it was
supposed to work previously. In the meantime CI is broken so reverting
for now.

Fixes: 444e2a19d7fd ("ttm/pool: port to list_lru. (v2)")
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patch.msgid.link/20260409142658.1511941-2-dev@lankhorst.se