CONFIG_TILE_USB is not available for thedefaultarchitecture x86.
Result is shown for architecture tile

Tilera USB host adapter support

modulename: usb.ko

configname: CONFIG_TILE_USB

Linux Kernel Configuration
└─>Bus options
└─>Tilera USB host adapter support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Provides USB host adapter support for the built-in EHCI and OHCI
interfaces on TILE-Gx chips.

source code:
arch/tile/kernel/usb.c