linux-atm: put all packages into their own submenus

Now that we package individual tools as well, the list of ATM tools is
pretty big to deserve its own submenu.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 34504

package/linux-atm/Makefile

@@ -43,6 +43,7 @@ define Package/linux-atm/Default
   CATEGORY:=Network
   DEPENDS:=linux-atm
   URL:=http://linux-atm.sourceforge.net/
+  SUBMENU:=Linux ATM tools
 endef
 
 define Package/atm-tools