drm/i915/psr: Include PSR_PERF_CNT in debugfs output on all platforms

The fact that DC states reset the PSR perofrmance counter
is no reason not to include it in the debug output.
But let's keep the comment there to remind people about
that caveat.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230411191429.29895-8-ville.syrjala@linux.intel.com


Reviewed-by: Jouni Högander <jouni.hogander@intel.com>