default or selected kernelversion does not have config value CONFIG_IEEE1394_SBP2_PHYS_DMA.
Result is shown for kernelversion 5.4.229

Enable replacement for physical DMA in SBP2

configname: CONFIG_IEEE1394_SBP2_PHYS_DMA

Linux Kernel Configuration
└─>Device Drivers
└─>IEEE 1394 (FireWire) support
└─>Enable replacement for physical DMA in SBP2
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This builds sbp2 for use with non-OHCI host adapters which do not
support physical DMA or for when ohci1394 is run with phys_dma=0.
Physical DMA is data movement without assistance of the drivers'
interrupt handlers. This option includes the interrupt handlers
that are required in absence of this hardware feature.

This option is buggy and currently broken on some architectures.
If unsure, say N.

depends
CONFIG_EXPERIMENTAL
CONFIG_IEEE1394_SBP2
CONFIG_VIRT_TO_BUS
CONFIG_BROKEN or CONFIG_PCI