meta-openpower: Remove references to OPENPOWERBASE

OPENPOWERBASE is only used for pointing at licenses...point at the
licenses in oe-core in meta/files/common-licenses instead. to match the
defacto convention used in other oe layers like meta-openembedded.

(From meta-openpower rev: 2e899dc36982e5420f136da967669544e49c0c0e)

Change-Id: Ia201bc5e60a9e4cd2392bb3735c99596d1fee006
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openpower/recipes-phosphor/ipmi/hostboot-inventory-config-native.bb b/meta-openpower/recipes-phosphor/ipmi/hostboot-inventory-config-native.bb
index b60a9e3..bd0a8ee 100644
--- a/meta-openpower/recipes-phosphor/ipmi/hostboot-inventory-config-native.bb
+++ b/meta-openpower/recipes-phosphor/ipmi/hostboot-inventory-config-native.bb
@@ -1,7 +1,7 @@
 SUMMARY = "Hostboot hostfw inventory map for phosphor-ipmi-fru"
 PR = "r1"
 LICENSE = "Apache-2.0"
-LIC_FILES_CHKSUM = "file://${OPENPOWERBASE}/COPYING.apache-2.0;md5=34400b68072d710fecd0a2940a0d1658"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
 
 inherit native
 inherit phosphor-ipmi-fru