drm/i915/psr: Deactivate PSR only on LNL and when selective fetch enabled

drm/i915/psr: Deactivate PSR only on LNL and when selective fetch enabled

Using intel_psr_exit in frontbuffer flush on older platforms seems to be
causing problems.

Sending single full frame update using intel_psr_force_update is anyways
more optimal compared to psr deactivate/activate -> move back to this
approach on PSR1, PSR HW tracking and Panel Replay full frame update and
use deactivate/activate only on LunarLake and only when selective fetch is
enabled.

Tested-by: Lemen <lemen@lemen.xyz>
Tested-by: Koos Vriezen <koos.vriezen@gmail.com>
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14946
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://lore.kernel.org/r/20250922102725.2752742-1-jouni.hogander@intel.com