bsp: make board config dynamic

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>

bsp/default/root_file_system/etc/config/board

@@ -0,0 +1 @@
+config model 'model'

bsp/default/root_file_system/etc/rc.local.tpl

@@ -1,12 +1,15 @@
 # Put your custom commands here that should be executed once
 # the system init finished. By default this file does nothing.
 
+BOARD=$(cat /var/sysinfo/board_name)
+if ! uci get board.model.name; then
+    uci set board.model.name=BOARD
+fi
+. /etc/rc.local.$BOARD
+
 # collect environment info and write to dot-script
 /etc/environment.sh > /tmp/environment
 
-BOARD=$(cat /var/sysinfo/board_name)
-. /etc/rc.local.$BOARD
-
 # Starting NTP-Client Daemon
 ntpd -p ${NTPD_IP}
 

bsp/wr841n9/root_file_system/etc/config/board

@@ -1,2 +0,0 @@
-config model 'model'
-	option name 'tl-wr841n-v9'