kernel/modules: relocate teql hotplug from iproute2 to kmod-sched

The link equalizer sch_teql.ko of package kmod-sched relies on a hotplug
script historically included in iproute2's tc package. In previous
discussion [1], consensus was the hotplug script is best located together
with the module in kmod-sched, but this change was deferred at the time.

Relocate the hotplug script now. This change also simplifies adding a tc
variant for minimal size with reduced functionality.

[1] https://github.com/openwrt/openwrt/pull/1627#issuecomment-447923636

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>

package/network/utils/iproute2/Makefile

@@ -166,8 +166,6 @@ endef
 define Package/tc/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/tc/tc $(1)/usr/sbin/
-	$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
-	$(INSTALL_BIN) ./files/15-teql $(1)/etc/hotplug.d/iface/
 ifeq ($(SHARED_LIBS),y)
 	$(INSTALL_DIR) $(1)/usr/lib/tc
 	$(CP) $(PKG_BUILD_DIR)/tc/*.so $(1)/usr/lib/tc

package/network/utils/iproute2/files/15-teql

@@ -1,23 +0,0 @@
-#!/bin/sh
-
-. /lib/functions.sh
-
-if [ "$ACTION" != "ifup" ]; then
-	exit
-fi
-
-config_load network
-
-config_get teql $INTERFACE teql
-
-if [ "$teql" != "" ]; then
-    logger Adding device $DEVICE to TEQL master $teql
-    insmod sch_teql
-    tc qdisc add dev $DEVICE root $teql
-
-    # The kernel doesn't let us bring it up until it has at least one
-    # slave. So bring it up now, if it isn't already.
-    if ! cat /sys/class/net/$teql/carrier &>/dev/null; then
-        ifup $teql &
-    fi
-fi