CONFIG_SOC_OMAP3430 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

OMAP3430 support

configname: CONFIG_SOC_OMAP3430

Linux Kernel Configuration
└─>TI OMAP/AM/DM/DRA Family
└─>TI OMAP2/3/4 Specific Features
└─>OMAP3430 support
In linux kernel since version 2.6.39 (release Date: 2011-05-18)