Add override for aspeed bsp machine.

Upstream yocto is organized such that there is only bblayer for all
builds and overrides are used to customize recipes for any specific
platform.

It's possible for a group to use openbmc/openbmc as part of their
distro and run into issues with recipes that are comingled.

Change-Id: I5dc6e8c1448d95da1b5ee64b220e2955466cdf4e
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend b/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
index 070f389..ece33b0 100644
--- a/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
+++ b/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
@@ -1,8 +1,8 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+FILESEXTRAPATHS_prepend_ast2500 := "${THISDIR}/files:"
 
-SRC_URI += "file://fw_env.config"
+SRC_URI_append_ast2500 = " file://fw_env.config"
 
-do_install_append() {
+do_install_append_ast2500() {
     if [ -e ${WORKDIR}/fw_env.config ] ; then
         install -d ${D}${sysconfdir}
         install -m 644 ${WORKDIR}/fw_env.config ${D}${sysconfdir}/fw_env.config