Stop including a possibly GPLd header from the GPIO code. Add the only

needed macro to ofw_gpiobus.c.

Reported by:	emaste
Sponsored by:	DARPA, AFRL

sys/dev/gpio/gpiobusvar.h

@@ -38,7 +38,6 @@
 
 #ifdef FDT
 #include <dev/ofw/ofw_bus_subr.h>
-#include <gnu/dts/include/dt-bindings/gpio/gpio.h>
 #endif
 
 #ifdef	INTRNG

sys/dev/gpio/ofw_gpiobus.c

@@ -41,6 +41,8 @@ __FBSDID("$FreeBSD$");
 
 #include "gpiobus_if.h"
 
+#define	GPIO_ACTIVE_LOW		1
+
 static struct ofw_gpiobus_devinfo *ofw_gpiobus_setup_devinfo(device_t,
 	device_t, phandle_t);
 static void ofw_gpiobus_destroy_devinfo(device_t, struct ofw_gpiobus_devinfo *);