Make wait_for_interrupt available to all atspi tools.

- tools/atspi-txrx/atspi-txrx.c: cleaned up includes - we need stdint.h but
  we don't need atspi/ep0.h
- tools/atspi-txrx/atspi-txrx.c (wait_for_interrupt),
  tools/include/misctxrx.h (wait_for_interrupt), tools/lib/Makefile (OBJS),
  tools/lib/misctxrx.c (wait_for_interrupt): moved wait_for_interrupt from
  atspi-txrx to the atspi library, so that we can share it

tools/include/misctxrx.h

@@ -0,0 +1,24 @@
+/*
+ * include/misctxrx.h - Miscellaenous transceiver helper functions
+ *
+ * Written 2010 by Werner Almesberger
+ * Copyright 2010 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef MISCTXRX_H
+#define	MISCTXRX_H
+
+#include <stdint.h>
+
+#include "atspi.h"
+
+
+uint8_t wait_for_interrupt(struct atspi_dsc *dsc, uint8_t wait_for,
+    uint8_t ignore, int sleep_us, int timeout);
+
+#endif /* !MISCTXRX_H */