CONFIG_SOC_OMAP5 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

TI OMAP5

modulename: prm44xx.ko

and/or

omap-mpuss-lowpower.ko

and/or

dpll3xxx.ko

configname: CONFIG_SOC_OMAP5

Linux Kernel Configuration
└─>TI OMAP2/3/4 Specific Features
└─>TI OMAP5
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
arch/arm/mach-omap2/prm44xx.c