modules: create usbnet gadget module

Port the usbnet motorola gadget driver for
factory to a loadable module.

Change-Id: I6713b97d6e6c2e2dfb90b703a7a17694d44bdccb
Signed-off-by: Ryan Lattrel <ryanl@motorola.com>
Reviewed-on: https://gerrit.mot.com/1147494
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Kenneth Kessler <kennykessler@motorola.com>
Submit-Approved: Jira Key

drivers/moto_f_usbnet/Android.mk

@@ -0,0 +1,8 @@
+DLKM_DIR := motorola/kernel/modules
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := moto_f_usbnet.ko
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_PATH := $(KERNEL_MODULES_OUT)
+include $(DLKM_DIR)/AndroidKernelModule.mk

drivers/moto_f_usbnet/Kbuild

@@ -0,0 +1,6 @@
+# add -Wall to try to catch everything we can.
+EXTRA_CFLAGS += -Wall
+EXTRA_CFLAGS += -I$(TOP)/motorola/kernel/modules/include
+
+moto_f_usbnet-objs += f_usbnet.o
+obj-m += moto_f_usbnet.o

drivers/moto_f_usbnet/Makefile

@@ -0,0 +1,10 @@
+KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build
+
+all:
+	$(MAKE) -C $(KERNEL_SRC) M=$(shell pwd) modules $(KBUILD_OPTIONS)
+
+modules_install:
+	$(MAKE) INSTALL_MOD_STRIP=1 -C $(KERNEL_SRC) M=$(shell pwd) modules_install
+
+clean:
+	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean