fix kernel module packaging

mk/kernel.mk

@@ -1,6 +1,8 @@
 # This file is part of the OpenADK project. OpenADK is copyrighted
 # material, please see the LICENCE file in the top-level directory.
 
+include $(TOPDIR)/mk/kernel-ver.mk
+
 LINUX_KMOD_SUFFIX=ko
 MODULES_SUBDIR := lib/modules/$(KERNEL_MOD_VERSION)
 LINUX_BUILD_DIR := $(BUILD_DIR)/linux-$(ADK_TARGET_ARCH)