CONFIG_SOC_DRA7XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

TI DRA7XX

modulename: omap4-restart.ko

and/or

omap-mpuss-lowpower.ko

and/or

powerdomains7xx_data.ko

and/or

clockdomains7xx_data.ko

and/or

dpll3xxx.ko

and/or

omap_hwmod_7xx_data.ko

configname: CONFIG_SOC_DRA7XX

Linux Kernel Configuration
└─>TI OMAP/AM/DM/DRA Family
└─>TI DRA7XX
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
arch/arm/mach-omap2/omap4-restart.c