[PATCH 1/1] riscv: Get cache information through sysconf

[Florian Weimer]

* Zong Li:

> Add support to query cache information on RISC-V through sysconf()
> function. The cache information had been added in AUX vector of RISC-V
> architecture in Linux kernel v.5.10-rc1.

I think this needs error reporting in case the auxiliary vector does
not contain the requested information.