forked from Mirrors/opensbi

Enable vector context in mstatus by updating the corresponding bits in mstatus if vector extension is supported by the hart. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>