[PATCH v6 05/17] riscv: Extend cpufeature.c to detect vendor extensions

[Evan Green]

On Fri, May 3, 2024 at 11:18 AM Charlie Jenkins <charlie at rivosinc.com> wrote:
>
> Separate vendor extensions out into one struct per vendor
> instead of adding vendor extensions onto riscv_isa_ext.
>
> Add a hidden config RISCV_ISA_VENDOR_EXT to conditionally include this
> code.
>
> The xtheadvector vendor extension is added using these changes.
>
> Signed-off-by: Charlie Jenkins <charlie at rivosinc.com>

Reviewed-by: Evan Green <evan at rivosinc.com>