CONFIG_ARCH_OMAP3 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

TI OMAP3

modulename: omap3-restart.ko

and/or

sdrc3xxx.ko

and/or

opp3xxx_data.ko

and/or

pm34xx.ko

and/or

cpuidle34xx.ko

and/or

prm2xxx_3xxx.ko

and/or

vc3xxx_data.ko

and/or

voltagedomains3xxx_data.ko

and/or

powerdomains3xxx_data.ko

and/or

powerdomains2xxx_3xxx_data.ko

and/or

clockdomains2xxx_3xxx_data.ko

and/or

clockdomains3xxx_data.ko

and/or

omap_hwmod_2xxx_3xxx_ipblock_data.ko

and/or

omap_hwmod_3xxx_data.ko

configname: CONFIG_ARCH_OMAP3

Linux Kernel Configuration
└─>TI OMAP/AM/DM/DRA Family
└─>TI OMAP3
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
source code:
arch/arm/mach-omap2/omap3-restart.c