Update HCODE to hw061517a.910

  Grab latest HCODE image in preparation for P9 DD2.0

  Has a co-req to OCC 53c19c213e9ca6769bca90e864291898c5783a47,
  but that has compile issue, so tieing to fixed commit of
  1dc97a688e32e63420533bfde8c6d7d2996619ea.
diff --git a/openpower/package/occ/occ.mk b/openpower/package/occ/occ.mk
index ee7dbe2..fb62b71 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 ?= 852d3b94da35cfa28c08f871df6eff4a21681d60
+OCC_VERSION_BRANCH_MASTER ?= 1dc97a688e32e63420533bfde8c6d7d2996619ea
 
 OCC_VERSION ?= $(if $(BR2_OPENPOWER_POWER9),$(OCC_VERSION_BRANCH_MASTER),$(OCC_VERSION_BRANCH_MASTER_P8))
 OCC_SITE ?= $(call github,open-power,occ,$(OCC_VERSION))