CONFIG_ARCH_OMAP2420 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

OMAP2420 support

modulename: clock2420_data.ko

and/or

omap_hwmod_2420_data.ko

and/or

opp2420_data.ko

and/or

sram242x.ko

and/or

mux2420.ko

configname: CONFIG_ARCH_OMAP2420

Linux Kernel Configuration
└─>OMAP2420 support
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
source code:
/arch/arm/mach-omap2/

depends
CONFIG_ARCH_OMAP2 |
| CONFIG_ARCH_OMAP2PLUS

is selected by
CONFIG_MACH_NOKIA_N8X0