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. Tested-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Tsukasa OI <research_trasio@irq.a4lg.com> [Improved commit text and comments] Signed-off-by: Atish Patra <atishp@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>