drm/i915/psr: Inform Panel Replay source support on eDP as well

Display version >= 20 support eDP 1.5. Inform Panel Replay source support
on eDP for display version >= 20.

Bspec: 68920

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240619062131.4021196-3-jouni.hogander@intel.com