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

HTC Himalaya Support

modulename: himalaya.ko

configname: CONFIG_MACH_HIMALAYA

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>HTC Himalaya Support
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
source code:
arch/arm/mach-pxa/himalaya.c

depends
CONFIG_ARCH_PXA |
| CONFIG_ATAGS or CONFIG_UNUSED_BOARD_FILES