Added patch notes from Hank Chang

Signed-off-by: Artem Senichev <a.senichev@yadro.com>
diff --git a/openpower/patches/vesnin-patches/hostboot/hostboot-0005-Fill-empty-sensor-id-to-reserved-id-0xFF.patch b/openpower/patches/vesnin-patches/hostboot/hostboot-0005-Fill-empty-sensor-id-to-reserved-id-0xFF.patch
index 2cf8cdb..9fec1aa 100644
--- a/openpower/patches/vesnin-patches/hostboot/hostboot-0005-Fill-empty-sensor-id-to-reserved-id-0xFF.patch
+++ b/openpower/patches/vesnin-patches/hostboot/hostboot-0005-Fill-empty-sensor-id-to-reserved-id-0xFF.patch
@@ -3,6 +3,19 @@
 Date: Tue, 13 Mar 2018 15:44:05 +0300
 Subject: [PATCH] Fill empty sensor id to reserved id 0xFF
 
+
+Hank Chang: This patch achieves the following goals:
+a. Auto set all empty sensors with reserved ID - 0xFF instead of being 0x0 in
+   the mrw process (would cause some duplicate sensor@0 in skiboot)
+b. In this way, they could simply save 128 empty DIMM_Temp* IDs to become
+   all 0xFF, and OCC would still report all the non-zero ID's DIMM_Temp*
+   reading in the poll response.
+   And then, apply another "occ-0001-Add-DIMM-temperature-sensors.patch"
+   can customize/override these 0xFF temp_sid again based on the different
+   CPU/Cen/DIMM index which can be decoded by OpenBMC accordingly.
+c. Just simply prints the "N/A" (0xFF) string in the *.rpt file for reviewing
+   all the undefined/reserved sensor targets.
+
 Originally created by MSI (S188)
 
 Signed-off-by: Artem Senichev <a.senichev@yadro.com>