CONFIG_MACH_OMAP_H3 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_OMAP_H3.
Result is shown for kernelversion 6.9.9

TI H3 Support

modulename: board-h3.ko

configname: CONFIG_MACH_OMAP_H3

Linux Kernel Configuration
└─>TI OMAP1
└─>TI OMAP1 specific features
└─>TI H3 Support
In linux kernel since version 2.6.12  
TI OMAP 1710 H3 board support. Say Y here if you have such
a board.

source code:
/arch/arm/mach-omap1/