drm/i915/debugfs: DISPLAY_VER 13 lpsp capability

Extend i915_lpsp_capability debugfs to DG2,ADLP and future platforms.

v2: commit log modification.

Cc: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210713075738.23759-1-anshuman.gupta@intel.com

drivers/gpu/drm/i915/display/intel_display_debugfs.c

@@ -2256,6 +2256,11 @@ static int i915_lpsp_capability_show(struct seq_file *m, void *data)
 	if (connector->status != connector_status_connected)
 		return -ENODEV;
 
+	if (DISPLAY_VER(i915) >= 13) {
+		LPSP_CAPABLE(encoder->port <= PORT_B);
+		return 0;
+	}
+
 	switch (DISPLAY_VER(i915)) {
 	case 12:
 		/*