CONFIG_MACH_HREFV60 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

U8500 Development platform, HREFv60 version

configname: CONFIG_MACH_HREFV60

Linux Kernel Configuration
└─>ST-Ericsson U8500 Series
└─>U8500 Development platform, HREFv60 version
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Include support for the HREFv60 new development platform.
Includes HREFv70, v71 etc.


depends
CONFIG_ARCH_U8500 |
| CONFIG_UX500_SOC_DB8500