CONFIG_IRQ_SPORT3_RX is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin

IRQ_SPORT3_RX

configname: CONFIG_IRQ_SPORT3_RX

Linux Kernel Configuration
└─>BF548 Specific Configuration
└─>Priority
└─>IRQ_SPORT3_RX
In linux kernel since version 2.6.23 (release Date: 2007-10-09)