CONFIG_ARCH_OMAP2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

TI OMAP2

modulename: sdrc2xxx.ko

and/or

pm24xx.ko

and/or

sleep24xx.ko

and/or

prcm.ko

and/or

clockdomain.ko

and/or

omap_device.ko

configname: CONFIG_ARCH_OMAP2

Linux Kernel Configuration
└─>TI OMAP2/3/4 Specific Features
└─>TI OMAP2
In linux kernel since version 2.6.13 (release Date: 2005-08-28)  
source code:
arch/arm/mach-omap2/sdrc2xxx.c
selects
CONFIG_CPU_V6