iopsys-brcm63xx-arm: make panther ready

iopsys-brcm63xx-arm/panther/base-files/lib/functions/iopsys-environment.sh

@@ -9,7 +9,7 @@ get_macaddr_maxsize() {
 }
 
 get_board_id() {
-	local board_id="$(fw_printenv -n boardid | tr '_' '-')"
+	local board_id="$(fw_printenv -n boardid)"
 	echo "$board_id"
 }