CONFIG_ARCH_OMAP4 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

TI OMAP4

modulename: prm44xx.ko

and/or

omap44xx-smc.ko

and/or

mux44xx.ko

and/or

opp4xxx_data.ko

and/or

pm44xx.ko

and/or

prcm.ko

and/or

clockdomain.ko

and/or

omap_hwmod_44xx_data.ko

and/or

omap_l3_noc.ko

and/or

hwspinlock.ko

and/or

omap_device.ko

configname: CONFIG_ARCH_OMAP4

Linux Kernel Configuration
└─>TI OMAP2/3/4 Specific Features
└─>TI OMAP4
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
source code:
arch/arm/mach-omap2/prm44xx.c


is selected by
CONFIG_OMAP4_ERRATA_I688