[PATCH v3 3/3] RISC-V: Extract multi-letter extension names from "riscv, isa"

[Heiko Stübner]

Am Samstag, 12. Februar 2022, 07:30:01 CET schrieb Tsukasa OI:
> Currently, there is no usage for version numbers in extensions as
> any ratified non base ISA extension will always at v1.0.
> 
> Extract the extension names in place for future parsing.
> 
> Signed-off-by: Tsukasa OI <research_trasio at irq.a4lg.com>
> [Improved commit text and comments]
> Signed-off-by: Atish Patra <atishp at rivosinc.com>

Tested-by: Heiko Stuebner <heiko at sntech.de>