[media] dvb-usb: remove another redundant #include <linux/kconfig.h>

Kernel source files need not include <linux/kconfig.h> explicitly
because the top Makefile forces to include it with:

-include $(srctree)/include/linux/kconfig.h

Remove another reduntdant include, that managed to sneak by commit
97139d4a6f26 ("treewide: remove redundant #include <linux/kconfig.h>").

Signed-off-by: Paul Bolle <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/usb/dvb-usb/dibusb-mc-common.c

···
  * see Documentation/dvb/README.dvb-usb for more information
  */
 
-#include <linux/kconfig.h>
 #include "dibusb.h"
 
 /* 3000MC/P stuff */