op-build update 5-17-2019

Changes Included for package hostboot, branch master:
574186e - Louis Stermole - 2019-05-16 - Clear Explorer outbound doorbell after reading cmd response
9870db1 - Louis Stermole - 2019-05-16 - Change CRC gen/check for Explorer inband to match EXP firmware
4a2e3c2 - Stephen Glancy - 2019-05-16 - Adds new attributes for 07MAY19 explorer specification
4cc19fd - Sharath Manjunath - 2019-05-16 - Add exp_thermal_init for Explorer FW
da246c5 - Alvin Wang - 2019-05-16 - Add empty files for mcbist library refactoring
22d6da8 - Matt Derksen - 2019-05-16 - NVDIMM info logs around update
4f842cf - Mike Baiocchi - 2019-05-16 - Combine 'generic' and 'explorer' OCMB chip targets
686bbf5 - Caleb Palmer - 2019-05-16 - Add OCMB_CHIP support for BAD_DQ_BITMAP getters/setters
31aec74 - Zane Shelley - 2019-05-16 - PRD: debug trace output update for OCMB models

Signed-off-by: hostboot <hostboot@us.ibm.com>
diff --git a/openpower/package/hostboot/Config.in b/openpower/package/hostboot/Config.in
index 8d2d393..d41178e 100644
--- a/openpower/package/hostboot/Config.in
+++ b/openpower/package/hostboot/Config.in
@@ -25,7 +25,7 @@
 
 config BR2_HOSTBOOT_VERSION
 	string
-	default "64f4f47ac448e645dcdf4eb94d327481cc42a8fb" if BR2_HOSTBOOT_LATEST_VERSION
+	default "574186ea098a9e9dbb6de4ffa44e9489f3125e01" if BR2_HOSTBOOT_LATEST_VERSION
 	default BR2_HOSTBOOT_CUSTOM_VERSION_VALUE \
 		if BR2_HOSTBOOT_CUSTOM_VERSION