CONFIG_IRQ_REMAP is not available for the default architecture x86.
Result is shown for architecture 64BIT

Support for Interrupt Remapping

modulename: irq_remapping.ko
configname: CONFIG_IRQ_REMAP

Linux Kernel Configuration
└─> Device Drivers
└─> IOMMU Hardware Support
└─> Support for Interrupt Remapping

Supports Interrupt remapping for IO-APIC and MSI devices.
To use x2apic mode in the CPU's which support x2APIC enhancements or
to support platforms with CPU's having > 8 bit APIC ID, say Y.

source code: