apm821xx: add uboot-envtools support

All apm821xx devices use u-boot and most of them have
an accessible u-boot environment. This patch adds the
necessary template file, but does not add the
uboot-envtools package to any of the targets.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

package/boot/uboot-envtools/files/apm821xx

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+[ -e /etc/config/ubootenv ] && exit 0
+
+touch /etc/config/ubootenv
+
+. /lib/uboot-envtools.sh
+. /lib/functions.sh
+
+board=$(board_name)
+
+case "$board" in
+esac
+
+config_load ubootenv
+config_foreach ubootenv_add_app_config ubootenv
+
+exit 0