CONFIG_ARCH_OMAP2430 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

OMAP2430 support

modulename: mux2430.ko

and/or

omap_hwmod_2430_data.ko

and/or

sram243x.ko

and/or

clock2430.ko

and/or

opp2430_data.ko

configname: CONFIG_ARCH_OMAP2430

Linux Kernel Configuration
└─>OMAP2430 support
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
source code:
/arch/arm/mach-omap2/

depends
CONFIG_ARCH_OMAP2 |
| CONFIG_ARCH_OMAP2PLUS

is selected by
CONFIG_USB_MUSB_AM35X