platform/x86/intel/pmt: Ignore uninitialized entries

On Intel Xeon, unused PMT regions will have uninitialized discovery headers
containing all 0xF. Instead of returning an error, just skip the region.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230413012922.1521377-1-david.e.box@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Author: debox1

drivers/platform/x86/intel/pmt/telemetry.c

@@ -78,7 +78,7 @@ static int pmt_telem_header_decode(struct intel_pmt_entry *entry,
 	 * reserved for future use. They have zero size. Do not fail
 	 * probe for these. Just ignore them.
 	 */
-	if (header->size == 0)
+	if (header->size == 0 || header->access_type == 0xF)
 		return 1;
 
 	return 0;