Add foo_LICENSE_FILES for all OpenPOWER projects that are missing them

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
diff --git a/openpower/package/openpower-pnor/openpower-pnor.mk b/openpower/package/openpower-pnor/openpower-pnor.mk
index ef72704..70e96a9 100644
--- a/openpower/package/openpower-pnor/openpower-pnor.mk
+++ b/openpower/package/openpower-pnor/openpower-pnor.mk
@@ -12,6 +12,7 @@
 OPENPOWER_PNOR_SITE ?= $(call github,open-power,pnor,$(OPENPOWER_PNOR_VERSION))
 
 OPENPOWER_PNOR_LICENSE = Apache-2.0
+OPENPOWER_PNOR_LICENSE_FILES = LICENSE
 OPENPOWER_PNOR_DEPENDENCIES = hostboot hostboot-binaries $(XML_PACKAGE) skiboot host-openpower-ffs occ capp-ucode
 
 ifeq ($(BR2_PACKAGE_SKIBOOT_EMBED_PAYLOAD),n)