USB: Use menuconfig objects

Make a "menuconfig" out of the Kconfig objects "menu, ..., endmenu", so that
the user can disable all the options in that menu at once instead of having to
disable each option separately.

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>