Add sysfs node /sys/private/vreg Get regulator states for debugging Change-Id: I783fbcac43994ed39047ea18a1893a6a35032efc Signed-off-by: haojl2 <haojl2@motorola.com> Reviewed-on: https://gerrit.mot.com/1453713 SLTApproved: Slta Waiver SME-Granted: SME Approvals Granted Tested-by: Jira Key Reviewed-by: Jianqi Yang <yangj@motorola.com> Submit-Approved: Jira Key Reviewed-on: https://gerrit.mot.com/1509720 Reviewed-by: Wang Wang <wangwang1@lenovo.com>