CONFIG_MPIC_U3_HT_IRQS is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
CONFIG_MPIC_U3_HT_IRQS (not configurable)
configname: CONFIG_MPIC_U3_HT_IRQS
Linux Kernel Configuration
└─>Platform support
└─>MPIC_U3_HT_IRQS