usb: gadget: libcomposite: move config.c into libcomposite

This patch moves config.c into libcomposite and updates all gadgets.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/nokia.c

@@ -39,7 +39,6 @@
  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  */
 #include "composite.c"
-#include "config.c"
 #include "epautoconf.c"
 
 #include "u_serial.c"