CONFIG_SOC_TI81XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

TI81XX support

modulename: omap_hwmod_81xx_data.ko

and/or

clockdomains81xx_data.ko

and/or

ti81xx-restart.ko

configname: CONFIG_SOC_TI81XX

Linux Kernel Configuration
└─>TI OMAP2/3/4 Specific Features
└─>TI81XX support
In linux kernel since version 3.1 (release Date: 2011-10-24)  

is selected by
CONFIG_USB_MUSB_DSPS