op-build update 4-10-2018

Changes Included for package occ, branch master:
6c9f28e - William Bryan - 2018-04-10 - Fix compile issue in op-build environment
437c820 - Douglas Gilbert - 2018-04-10 - OCC Centaur enable deadman timer
da6e77f - Chris Cain - 2018-04-10 - Use Turbo for max frequency until WOF is fully enabled
1bf5605 - Doug Gilbert - 2018-04-04 - OCC Centaur disable deadman timer and clean up code
d16e7d0 - William Bryan - 2018-04-02 - Minor fix for GPU reset SM and more FFDC
b57b1a9 - mbroyles - 2018-04-02 - Prevent Nimbus tasks from running prior to knowing memory type
1bbbfec - Doug Gilbert - 2018-03-28 - P9 Centaur sensor support
b3a2f75 - Chris Cain - 2018-03-28 - Fix DIMM overtemp bitmap and and trace updates
bd605ba - William Bryan - 2018-03-27 - Memory Throttle Sensors RTC:131184
c8538f3 - mbroyles - 2018-03-12 - Regulator N mode support

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/openpower/package/occ/occ.mk b/openpower/package/occ/occ.mk
index 547747d..b800e53 100644
--- a/openpower/package/occ/occ.mk
+++ b/openpower/package/occ/occ.mk
@@ -5,7 +5,7 @@
 ################################################################################
 
 OCC_VERSION_BRANCH_MASTER_P8 ?= 28f2cec690b7f19548ce860a8820f519e6c39a6a
-OCC_VERSION_BRANCH_MASTER ?= 768466b31e853cb11dfa90dbfc1565a21ee9646e
+OCC_VERSION_BRANCH_MASTER ?= 6c9f28ebe2596588ff6cc819bc4c2c158755ca43
 
 OCC_VERSION ?= $(if $(BR2_OPENPOWER_POWER9),$(OCC_VERSION_BRANCH_MASTER),$(OCC_VERSION_BRANCH_MASTER_P8))
 OCC_SITE ?= $(call github,open-power,occ,$(OCC_VERSION))