CONFIG_ARCH_OMAP16XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

OMAP16xx Based System

modulename: ocpi.ko

configname: CONFIG_ARCH_OMAP16XX

Linux Kernel Configuration
└─>OMAP16xx Based System
In linux kernel since version 2.6.12  
source code:
/arch/arm/plat-omap/ocpi.c