Change Makefile to pacify bitbake.

linux_driver/Makefile

+DRIVER_NAME := arduino_i2c
 KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build
 
-all: modules
+modules:
+	$(MAKE) -C $(KERNEL_SRC) KCPPFLAGS="$(EXTRA_CFLAGS)" M=$(PWD) modules
 
-%:
-	make -C $(KERNEL_SRC) M=$(PWD) $@
+modules_install:
+	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules_install
+
+install: modules_install
+
+clean:
+	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean