meta-aspeed: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I8135871ae0e3b360aff7d878f7cf04a2504f2dd0
diff --git a/meta-aspeed/recipes-bsp/u-boot/u-boot-aspeed.inc b/meta-aspeed/recipes-bsp/u-boot/u-boot-aspeed.inc
index 0b9bc20..19de5d2 100644
--- a/meta-aspeed/recipes-bsp/u-boot/u-boot-aspeed.inc
+++ b/meta-aspeed/recipes-bsp/u-boot/u-boot-aspeed.inc
@@ -182,7 +182,7 @@
 
 }
 
-FILES_${PN} = "/boot ${sysconfdir} ${datadir}"
+FILES:${PN} = "/boot ${sysconfdir} ${datadir}"
 
 do_deploy () {
     if [ -n "${UBOOT_CONFIG}" ]