CONFIG_ARC_DSP_NONE is not available for thedefaultarchitecture x86.
Result is shown for architecture arc

No DSP extension presence in HW

configname: CONFIG_ARC_DSP_NONE

DSP support
└─>No DSP extension presence in HW
In linux kernel since version 5.1 (release Date: 2019-05-05)  
No DSP extension presence in HW