Revert "drm/xe/lnl: Offload system clear page activity to GPU"

This optimization relied on having to clear CCS on allocations.
If there is no need to clear CCS on allocations then this would mostly
help in reducing CPU utilization.

Revert this patch at this moment because of:
1 Currently Xe can't do clear on free and using a invalid ttm flag,
TTM_TT_FLAG_CLEARED_ON_FREE which could poison global ttm pool on
multi-device setup.

2 Also for LNL CPU:WB doesn't require clearing CCS as such BO will
not be allowed to bind with compression PTE. Subsequent patch will
disable clearing CCS for CPU:WB BOs for LNL.

This reverts commit 23683061805be368c8d1c7e7ff52abc470cac275.

Cc: Christian König <[email protected]>
Cc: Himal Prasad Ghimiray <[email protected]>
Cc: Lucas De Marchi <[email protected]>
Cc: Matthew Auld <[email protected]>
Cc: Matthew Brost <[email protected]>
Cc: Thomas Hellström <[email protected]>
Reviewed-by: Thomas Hellström <[email protected]>
Signed-off-by: Nirmoy Das <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Lucas De Marchi <[email protected]>

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