op-build update 5-20-2021

Changes Included for package hostboot, branch master:
c4baf12 - Geetha Pisapati - 2021-05-19 - Add MDS support for power thermal throttling
fdf5404 - Matthew Hickman - 2021-05-19 - Added MRS attributes and MRS data handling for Explorer
a2c7529 - Stephen Glancy - 2021-05-19 - Fixes explorer initfile to allow for half DIMM mode

Signed-off-by: hostboot <hostboot@us.ibm.com>
diff --git a/openpower/package/hostboot/Config.in b/openpower/package/hostboot/Config.in
index 55a5f30..407425d 100644
--- a/openpower/package/hostboot/Config.in
+++ b/openpower/package/hostboot/Config.in
@@ -25,7 +25,7 @@
 
 config BR2_HOSTBOOT_VERSION
 	string
-	default "897062165531f24ca553500c9768d4e094ead233" if BR2_HOSTBOOT_LATEST_VERSION
+	default "c4baf12f73f0712e1a8fae8a0249776b50a79f67" if BR2_HOSTBOOT_LATEST_VERSION
 	default BR2_HOSTBOOT_CUSTOM_VERSION_VALUE \
 		if BR2_HOSTBOOT_CUSTOM_VERSION