CONFIG_SOC_AM33XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

TI AM33XX

modulename: am33xx-restart.ko

and/or

pm33xx-core.ko

and/or

powerdomains33xx_data.ko

and/or

clockdomains33xx_data.ko

configname: CONFIG_SOC_AM33XX

Linux Kernel Configuration
└─>TI OMAP/AM/DM/DRA Family
└─>TI AM33XX
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
arch/arm/mach-omap2/am33xx-restart.c