default or selected kernelversion does not have config value CONFIG_IEEE1394_ETH1394_ROM_ENTRY.
Result is shown for kernelversion 5.4.229

CONFIG_IEEE1394_ETH1394_ROM_ENTRY (not configurable)

configname: CONFIG_IEEE1394_ETH1394_ROM_ENTRY

Linux Kernel Configuration
└─>Device Drivers
└─>IEEE 1394 (FireWire) support
└─>IEEE1394_ETH1394_ROM_ENTRY
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
depends
CONFIG_IEEE1394
CONFIG_BROKEN or CONFIG_PCI

is depended by
CONFIG_IEEE1394_ETH1394