target/riscv/vector_helper.c: avoid env_archcpu() when reading RISCVCPUConfig

This file has several uses of env_archcpu() that are used solely to read
cfg->vlen. Use the new riscv_cpu_cfg() inline instead.

Suggested-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Weiwei Li<liweiwei@iscas.ac.cn>
Message-ID: <20230226170514.588071-3-dbarboza@ventanamicro.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
1 file changed