fetch diethotplug from kernel.org

package/hotplug/hotplug.mk

@@ -4,7 +4,7 @@
 #
 #############################################################
 HOTPLUG_SOURCE=diethotplug-0.4.tar.gz
-HOTPLUG_SITE=http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/linux-hotplug
+HOTPLUG_SITE=http://www.kernel.org/pub/linux/utils/kernel/hotplug/
 HOTPLUG_DIR=$(BUILD_DIR)/diethotplug-0.4
 
 $(DL_DIR)/$(HOTPLUG_SOURCE):