forked from Mirrors/opensbi

After supporting noncontigous hpm event and counters in opensbi, the number of hpm counters can be calculated by the mhpm_mask. So this field is unnecessary and can be removed to save some space. Signed-off-by: Inochi Amaoto <inochiama@outlook.com> Reviewed-by: Anup Patel <anup@brainfault.org>