CONFIG_C_CDPRIO is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_C_CDPRIO.
Result is shown for kernelversion 6.7-rc3

DMA has priority over core for ext. accesses

configname: CONFIG_C_CDPRIO

Linux Kernel Configuration
└─>Blackfin Processor Options
└─>EBIU_AMGCTL Global Control
└─>DMA has priority over core for ext. accesses
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
depends
NOT CONFIG_BF60x