meta-evb: Remove references to EVBBASE

EVBBASE 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-evb rev: 1da7522494e80d2355c240e0eb05ae7576ee32cf)

Change-Id: Ie2f441c1f53bf367bea7cb4fb4da51c7e5602d97
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

meta-evb/conf/layer.conf

@@ -3,6 +3,3 @@ BBPATH .= ":${LAYERDIR}"
 
 BBFILE_COLLECTIONS += "evb"
 BBFILE_PATTERN_evb = ""
-
-# Provide a variable that points the base of the evb layer.
-EVBBASE = '${@os.path.normpath("${LAYERDIR}/")}'

meta-evb/meta-evb-enclustra/meta-evb-zx3-pm3/recipes-phosphor/leds/evb-zx3-pm3-led-manager-config-native.bb

@@ -1,7 +1,7 @@
 SUMMARY = "Phosphor LED Group Management for Enclustra Mars ZX3"
 PR = "r1"
 LICENSE = "Apache-2.0"
-LIC_FILES_CHKSUM = "file://${EVBBASE}/COPYING.apache-2.0;md5=34400b68072d710fecd0a2940a0d1658"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
 
 inherit native