Modify NX unit name in POWER9 DTS file

Signed-off-by: Deepak K Gangadhar <deepakg@in.ibm.com>
diff --git a/openpower/package/ima-catalog/ima-catalog.mk b/openpower/package/ima-catalog/ima-catalog.mk
index 4548d1f..67b749d 100644
--- a/openpower/package/ima-catalog/ima-catalog.mk
+++ b/openpower/package/ima-catalog/ima-catalog.mk
@@ -3,7 +3,7 @@
 # ima-catalog.mk
 #
 ################################################################################
-IMA_CATALOG_VERSION ?= dce7c313e21f407e5140adeb6c9a976d453d5816 
+IMA_CATALOG_VERSION ?= 6a1fd25458a402878424167a4e4659056db693f4 
 IMA_CATALOG_SITE ?= $(call github,open-power,ima-catalog,$(IMA_CATALOG_VERSION))
 IMA_CATALOG_LICENSE = Apache-2.0
 IMA_CATALOG_DEPENDENCIES = host-dtc host-xz