mvebu: set fan_ctrl.sh only on mamba

Signed-off-by: Hans Geiblinger <cybrnook2002yahoo.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name> [cleanup]

target/linux/mvebu/base-files/etc/crontabs/root

@@ -1 +0,0 @@
-*/5 * * * * /sbin/fan_ctrl.sh

target/linux/mvebu/base-files/etc/uci-defaults/04_mambafan

@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+# Copyright (C) 2017 LEDE-Project.org
+#
+
+. /lib/mvebu.sh
+
+board=$(mvebu_board_name)
+
+case "$board" in
+armada-xp-linksys-mamba)
+	# Set fan script execution in crontab
+	grep -s -q fan_ctrl.sh /etc/crontabs/root && exit 0
+
+	echo "# mamba fan script runs every 5 minutes" >> /etc/crontabs/root
+	echo "*/5 * * * * /sbin/fan_ctrl.sh" >> /etc/crontabs/root
+
+	# Execute one time after initial flash (instead of waiting 5 min for cron)
+	/sbin/fan_ctrl.sh
+	;;
+esac
+
+exit 0