gpio-button-hotplug: don't build for 3.3 kernels

3.3 kernels do not have the required changes which would make
gpio-button-hotplug work, disallow building on those kernels for now.

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39903 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/kernel/gpio-button-hotplug/Makefile

@@ -15,6 +15,7 @@ include $(INCLUDE_DIR)/package.mk
 
 define KernelPackage/gpio-button-hotplug
   SUBMENU:=Other modules
+  DEPENDS:=@!LINUX_3_3
   TITLE:=Simple GPIO Button Hotplug driver
   FILES:=$(PKG_BUILD_DIR)/gpio-button-hotplug.ko
   AUTOLOAD:=$(call AutoLoad,30,gpio-button-hotplug,1)