Update garrison.mk
Updating XML pointer to pick up WOF_FREQUENCY_UPLIFT table updates.
diff --git a/openpower/package/garrison-xml/garrison.mk b/openpower/package/garrison-xml/garrison.mk
index 9b96606..302523c 100644
--- a/openpower/package/garrison-xml/garrison.mk
+++ b/openpower/package/garrison-xml/garrison.mk
@@ -4,7 +4,7 @@
#
################################################################################
-GARRISON_XML_VERSION ?= 884bf2466dcc1b63baf92758e50fcc8e2ec551c5
+GARRISON_XML_VERSION ?= 18da29a4968317e8beecd49150d04941baa36914
GARRISON_XML_SITE ?= $(call github,open-power,garrison-xml,$(GARRISON_XML_VERSION))
GARRISON_XML_LICENSE = Apache-2.0