op-build update 5-25-2020

Changes Included for package hostboot, branch master:
508f9fe - Zane Shelley - 2020-05-22 - PRD: Reduce HW callout severity for L3 cache inhibited op
dfa2492 - Mike Baiocchi - 2020-05-22 - Improve Attribute Syncing For Key Clear Requests
f66ae38 - Caleb Palmer - 2020-05-21 - PRD: Correct unit checkstops in MCC to checkstop root cause

Signed-off-by: hostboot <hostboot@us.ibm.com>
diff --git a/openpower/package/hostboot/Config.in b/openpower/package/hostboot/Config.in
index 1647bdc..63bac55 100644
--- a/openpower/package/hostboot/Config.in
+++ b/openpower/package/hostboot/Config.in
@@ -25,7 +25,7 @@
 
 config BR2_HOSTBOOT_VERSION
 	string
-	default "9865ef91c0a29cbe44b2c5b6777a0ab339dfff80" if BR2_HOSTBOOT_LATEST_VERSION
+	default "508f9fe2050d00dc6989e5aec90c5ad5282fff5a" if BR2_HOSTBOOT_LATEST_VERSION
 	default BR2_HOSTBOOT_CUSTOM_VERSION_VALUE \
 		if BR2_HOSTBOOT_CUSTOM_VERSION