Fix build on FreeBSD with USB2

Including dev/usb/usb_ioctl.h fixes missing declaration
of USB_GET_REPORT_ID on FreeBSD-Current.

configure.ac

@@ -101,6 +101,7 @@ AC_CHECK_HEADERS([usbhid.h dev/usb/usbhid.h],, [bsd_backend=no],
 AC_CHECK_LIB([usbhid],[hid_get_item],, [bsd_backend=no])
 AM_CONDITIONAL(BSD_BACKEND, [test "x$bsd_backend" = xyes])
 if test "x$bsd_backend" = xyes; then
+    AC_CHECK_HEADERS([dev/usb/usb_ioctl.h])
     AC_DEFINE(BSD_BACKEND, 1, [Compile BSD usbhid backend])
 fi
 

src/backend_bsd.c

@@ -43,6 +43,9 @@
 #include <usbhid.h>
 #include <dev/usb/usb.h>
 #include <dev/usb/usbhid.h>
+#ifdef HAVE_DEV_USB_USB_IOCTL_H
+    #include <dev/usb/usb_ioctl.h>
+#endif
 
 #include "jstk.h"
 #include "backend_bsd.h"