drm/i915/psr: Check Early Transport for Panel Replay as well

Move Early Transport validity check to be performed for Panel Replay as
well and use Early Transport for eDP Panel Replay always.

v2:set crtc_state->enable_psr2_su_region_et directly (not in if block)

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240619062131.4021196-11-jouni.hogander@intel.com