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

TI OMAP3

modulename: sram34xx.ko

and/or

mux34xx.ko

and/or

sdrc3xxx.ko

and/or

pm34xx.ko

and/or

cm.ko

and/or

omap_hwmod_3xxx_data.ko

and/or

omap_device.ko

configname: CONFIG_ARCH_OMAP3

Linux Kernel Configuration
└─>TI OMAP2/3/4 Specific Features
└─>TI OMAP3
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
source code:
/arch/arm/mach-omap2/