usb: kill DEBUG compile option

In the drivers that no longer need it, it is removed.
It is removed from the Makefile. Drivers not fully converted
to dynamic debug have it shifted down into the individual
drivers.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/imx21-dbg.c

@@ -18,6 +18,10 @@
 
 /* this file is part of imx21-hcd.c */
 
+#ifdef CONFIG_DYNAMIC_DEBUG
+#define DEBUG
+#endif
+
 #ifndef DEBUG
 
 static inline void create_debug_files(struct imx21 *imx21) { }