Revert "drm/xe/lnl: Enable GuC SLPC DCC task"

Revert "drm/xe/lnl: Enable GuC SLPC DCC task"

This reverts commit 50554bf3e56dd0c78ef1eedb685d0ab36c9c9987.

DCC in LNL should be disabled. It was a mistake to decide
to go against GuC platform defaults in this case and this
could lead to regressions in some TDP limited scenarios
instead of helping.

Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Cc: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250128223248.660748-1-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>