CONFIG_RISCV_SBI_V01 is not available for thedefaultarchitecture x86.
Result is shown for architecture riscv

SBI v0.1 support

configname: CONFIG_RISCV_SBI_V01

Linux Kernel Configuration
└─>Kernel features
└─>SBI v0.1 support
In linux kernel since version 5.1 (release Date: 2019-05-05)  
This config allows kernel to use SBI v0.1 APIs. This will be
deprecated in future once legacy M-mode software are no longer in use.