drm/i915/psr: Unify panel replay enable/disable sink

Unify enabling and disabling of psr/panel replay for a sink. Modify
intel_psr_enable_sink accordingly and use it for both cases.

v3:
  - move psr2_su_region_et_valid to be check for PSR2 only
v2:
  - enable panel replay for sink before link training
  - write ALPM_CONFIG only for PSR
  - add DP_PSR_CRC_VERIFICATION only for PSR
  - take care of disable sink as well

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405113602.992714-8-jouni.hogander@intel.com